Herbal Monograph
Cordyceps
Cordyceps militaris (L.) Fr.
Cordycipitaceae (Hypocreales)
Prized medicinal fungus for energy, endurance, immune resilience, and respira...
Overview
Plant Description
Cordyceps militaris is an entomopathogenic ascomycete fungus (not a plant) belonging to the order Hypocreales. In the wild, it parasitizes lepidopteran insect larvae and pupae, particularly moth species. The fungal lifecycle begins when airborne ascospores contact a suitable insect host, germinate, and penetrate the cuticle. The mycelium colonizes the host's body cavity, consuming internal tissues while the host remains alive for a period (the 'mummification' stage). Eventually the host dies and the fungus produces one or more club-shaped fruiting bodies (stromata) that emerge from the host's remains, typically from the head or thoracic region. The mature stroma is 2-8 cm tall, cylindrical to clavate (club-shaped), bright orange to scarlet-red in color, with a granular fertile head (the upper portion bearing perithecia) that is slightly thicker than the stalk. Perithecia are semi-immersed, flask-shaped structures (400-600 micrometers) that produce cylindrical asci containing filiform (thread-like) ascospores that fragment into part-spores at maturity. The vivid orange-red coloration is due to carotenoid pigments, primarily cordyxanthin. The mycelium is white to pale cream, cottony in culture, and produces cordycepin and other bioactive metabolites both in the mycelial phase and in the fruiting body. Unlike true plants, Cordyceps lacks roots, stems, leaves, chlorophyll, and all photosynthetic capacity -- it is an obligate heterotroph deriving all nutrition from its substrate.
Habitat
In the wild, C. militaris has a cosmopolitan distribution and is found in temperate forests across the Northern Hemisphere. It occurs in moist, shaded forest floors, particularly in deciduous and mixed forests with deep leaf litter. The fungus parasitizes buried or partially buried lepidopteran larvae and pupae, with fruiting bodies emerging from the soil surface in late summer through autumn (typically August-November in temperate regions). It prefers cool, humid microclimates with temperatures between 15-25 degrees C and high soil moisture. Unlike O. sinensis, which is restricted to high-altitude alpine meadows, C. militaris is found at a wide range of elevations from lowland forests to montane habitats.
Distribution
Cosmopolitan in temperate regions of the Northern Hemisphere. Found throughout East Asia (China, Japan, Korea), Europe (UK, Scandinavia, Central Europe), and North America. Wild populations are scattered and not abundant enough for commercial harvest. The vast majority of commercial C. militaris is produced through artificial cultivation, with China, South Korea, and Japan being the major producers. China dominates global production, with large-scale cultivation facilities in Liaoning, Hubei, Guangdong, and other provinces. South Korea has developed significant cultivation capacity since the early 2000s. Smaller cultivation operations exist in the United States, Thailand, Vietnam, and several European countries.
Parts Used
Fruiting body (stroma)
Preferred: Dried whole or powdered fruiting body for capsules, decoction, or standardized extract; hot water or hydroethanolic extraction for liquid preparations
The dried fruiting body (stroma) is the primary medicinal part and the form used in most clinical research and traditional applications. Contains the highest concentrations of cordycepin (3'-deoxyadenosine), the signature bioactive compound, along with adenosine, polysaccharides (beta-glucans), ergosterol, and carotenoid pigments. Cultivated fruiting bodies typically contain 2-8 mg/g cordycepin (up to 14 mg/g in optimized strains), substantially higher than wild O. sinensis fruiting bodies. The Chinese Pharmacopoeia and Korean Pharmacopoeia specify the dried fruiting body as the official drug.
Mycelium (cultured mycelial biomass)
Preferred: Dried mycelial powder or standardized mycelial extract (Cs-4); hot water extract for polysaccharide-rich preparations
Mycelium produced through submerged liquid fermentation (Cs-4 and related fermentation products) or solid-state cultivation on grain. Contains polysaccharides, adenosine, and some cordycepin, though cordycepin concentrations in mycelium are typically lower than in fruiting bodies. The Cs-4 mycelial fermentation product (Paecilomyces hepiali, a related anamorph originally isolated from O. sinensis) has been used in several Chinese clinical trials and is approved as a traditional medicine in China. Mycelium-on-grain products (MOG) are common in the North American supplement market but have been criticized for containing significant amounts of residual grain starch rather than pure fungal tissue. Alpha-glucan content (from grain starch) vs beta-glucan content (from fungal cell walls) is a key quality indicator.
Key Constituents
Nucleosides and nucleoside analogues
Nucleosides, particularly cordycepin, are considered the primary pharmacologically active constituents of C. militaris and are the basis for most modern research interest. Cordycepin's mechanism as an adenosine analogue gives it a unique pharmacological profile among medicinal fungi. The cordycepin content is the primary marker used for quality control and standardization of C. militaris products. The Chinese Pharmacopoeia uses adenosine content as a quality marker for Cordyceps preparations.
Polysaccharides
Polysaccharides are the second major class of bioactive compounds after nucleosides and are primarily responsible for the immunomodulatory effects of Cordyceps. They activate both innate and adaptive immune responses and are the basis for the traditional use of Cordyceps as a tonic to strengthen resistance to illness. Beta-glucan content is increasingly used alongside cordycepin as a quality marker for C. militaris products. Hot water extraction is required to fully solubilize and make bioavailable the high-molecular-weight polysaccharides.
Sterols and lipids
Ergosterol and its derivatives contribute to the anti-inflammatory and potential anticancer activities of Cordyceps preparations. The ergosterol content is also nutritionally significant as a provitamin D2 source, particularly for those following plant-based diets. UV-treated C. militaris fruiting bodies can provide meaningful amounts of vitamin D2.
Organic acids and sugar alcohols
D-mannitol (cordycepic acid) is a traditional quality marker in Chinese pharmacopeial standards for Cordyceps. Its osmotic and antioxidant properties may contribute modestly to the kidney-supportive and general tonic effects attributed to Cordyceps in traditional Chinese medicine.
Carotenoid pigments
Carotenoids contribute to the antioxidant capacity of C. militaris preparations. While not considered primary therapeutic compounds, they serve as visual quality markers. The total antioxidant activity of C. militaris extracts correlates in part with carotenoid content.
Amino acids and proteins
The high protein and amino acid content of C. militaris supports its classification as a nutritive tonic in traditional Chinese medicine. The amino acid profile contributes to overall nutritional value but is not considered a primary mechanism for the specific therapeutic effects.
Herbal Actions
Helps the body adapt to stress and restore homeostasis
Cordyceps militaris demonstrates classic adaptogenic properties: enhancing physical endurance and stamina, modulating the hypothalamic-pituitary-adrenal (HPA) axis stress response, improving oxygen utilization (VO2 max), and increasing resistance to physical, chemical, and biological stressors. Multiple RCTs have demonstrated improvements in exercise performance metrics. The adaptogenic action is mediated through combined effects of cordycepin (adenosine receptor modulation, AMPK activation), polysaccharides (immune balancing), and the broad nucleoside profile supporting cellular energy metabolism. Traditionally classified as a superior tonic (shang pin) in Chinese medicine, suitable for long-term use to restore vitality.
[1, 2, 5, 9]Modulates and balances immune function
C. militaris exhibits bidirectional immunomodulation -- enhancing immune function in immunocompromised states while dampening excessive immune activation. Beta-glucan polysaccharides activate innate immune cells (macrophages, NK cells, dendritic cells) through pattern recognition receptor binding (Dectin-1, TLR-2/4, CR3). Cordycepin modulates adaptive immunity by regulating T-cell differentiation and cytokine production, including suppression of excessive Th2 responses. In vitro and in vivo studies demonstrate increased NK cell activity, enhanced phagocytosis, modulation of TNF-alpha and IL-6 production, and promotion of regulatory T-cell activity. Clinical studies in Korean adults showed improved immune markers after C. militaris supplementation.
[7, 8, 9, 10]Prevents or slows oxidative damage to cells
Multiple antioxidant mechanisms: cordycepin and polysaccharides scavenge reactive oxygen species (superoxide, hydroxyl radicals, DPPH); ergosterol derivatives inhibit lipid peroxidation; polysaccharide fractions enhance endogenous antioxidant enzyme activity (SOD, CAT, GPx). C. militaris hot water extracts demonstrate strong DPPH, ABTS, and FRAP antioxidant activity in vitro. In vivo, supplementation has been shown to reduce markers of oxidative stress (MDA, 8-OHdG) and upregulate Nrf2-mediated antioxidant defense pathways. The antioxidant action underpins several therapeutic applications, including hepatoprotection, neuroprotection, and anti-aging effects.
[7, 8, 9]Reduces inflammation
Cordycepin is a potent anti-inflammatory agent that inhibits NF-kB signaling pathway activation, suppresses phosphorylation of IKK and IkB-alpha, and reduces production of pro-inflammatory mediators including TNF-alpha, IL-1beta, IL-6, iNOS, COX-2, and PGE2. Polysaccharide fractions modulate inflammatory cytokine balance. In animal models, C. militaris extracts have demonstrated efficacy in models of acute lung injury, hepatic fibrosis, renal inflammation, and neuroinflammation. The anti-inflammatory mechanism is distinct from NSAIDs and corticosteroids and involves upstream regulation of inflammatory signaling cascades.
[8, 9, 11]Protects the liver from damage
C. militaris extracts demonstrate hepatoprotective activity in multiple preclinical models, including carbon tetrachloride (CCl4)-induced liver injury, alcohol-induced liver damage, and non-alcoholic fatty liver disease (NAFLD) models. Mechanisms include antioxidant protection (reduced lipid peroxidation, enhanced SOD and GPx), anti-inflammatory activity (reduced hepatic TNF-alpha and IL-6), anti-fibrotic effects (reduced TGF-beta1 and collagen deposition), and promotion of hepatocyte regeneration. Cordycepin specifically inhibits hepatic stellate cell activation, a key step in liver fibrosis. Traditional Chinese medicine classifies Cordyceps as a kidney-liver tonic.
[1, 8, 9]Strengthens and tones the heart muscle
Adenosine content contributes to cardiovascular effects including vasodilation, modulation of heart rate, and inhibition of platelet aggregation via adenosine receptor activation (A1, A2A, A2B). Animal studies demonstrate improvements in cardiac output, reduction in myocardial oxygen consumption, and protection against ischemia-reperfusion injury. Cordycepin may improve lipid profiles by activating AMPK-mediated fatty acid oxidation. Traditional use includes support for cardiovascular weakness and arrhythmias. Clinical evidence remains preliminary.
[2, 9]Promotes the discharge of mucus from the respiratory tract
Traditional use in Chinese medicine for chronic cough, asthma, and respiratory debility. Cordyceps is classified as entering the Lung channel (gui jing) and is traditionally used to 'tonify the Lung, transform phlegm, and stop cough.' Preclinical evidence suggests bronchodilatory and anti-asthmatic effects, including inhibition of airway hyperresponsiveness and eosinophilic infiltration in allergic asthma models. The polysaccharide fraction may promote mucociliary clearance. Clinical evidence for respiratory indications is based primarily on traditional use and small observational studies.
[1, 2]Enhances cognitive function, memory, and mental performance
Emerging evidence suggests neuroprotective and cognitive-enhancing properties. Cordycepin crosses the blood-brain barrier and modulates adenosine receptor signaling in the CNS. Preclinical studies demonstrate protection against neuronal apoptosis, reduction of neuroinflammation (microglial activation, pro-inflammatory cytokines), improvement of learning and memory in aged rodent models, and promotion of neurogenesis. Adenosine receptor modulation may enhance cerebral blood flow. The nootropic action is considered mild and supportive rather than acutely stimulating.
[8, 9]Lowers blood pressure
Adenosine-mediated vasodilation and the presence of ACE-inhibitory peptides in C. militaris protein hydrolysates suggest mild antihypertensive potential. Animal studies have demonstrated modest blood pressure reductions with Cordyceps supplementation. The effect is considered gentle and supportive, suitable for use alongside conventional management. Insufficient clinical evidence for use as a standalone antihypertensive agent.
[2, 9]Therapeutic Indications
Immune System
Immunodeficiency and frequent infections
C. militaris polysaccharides activate innate immune cells (macrophages, NK cells) and enhance adaptive immune responses. A randomized, double-blind, placebo-controlled trial in healthy Korean adults (Jung et al. 2019) demonstrated that 8 weeks of C. militaris supplementation (1.5 g/day) significantly increased NK cell cytotoxicity and lymphocyte proliferation compared to placebo. Traditional use for strengthening resistance to infection is well documented in Chinese and Japanese medicine. Particularly indicated for recurrent upper respiratory infections, post-illness convalescence, and age-related immune decline.
[7, 8, 9]Adjunctive support during cancer treatment
Cordycepin demonstrates direct antitumor activity in vitro (induction of apoptosis, cell cycle arrest, inhibition of migration and invasion) across multiple cancer cell lines. Beta-glucan polysaccharides enhance antitumor immunity via NK cell and macrophage activation. Several small Chinese clinical studies of Cordyceps preparations (primarily Cs-4 mycelium) as adjuncts to chemotherapy reported improvements in quality of life, immune function markers, and reduced treatment side effects. However, high-quality RCTs with C. militaris specifically are lacking. Current evidence supports potential as an adjunctive immunological support agent, not as a standalone cancer treatment.
[8, 9, 10]Respiratory System
Chronic cough and respiratory debility
One of the primary traditional indications in Chinese medicine. Cordyceps is classified as entering the Lung channel and is used to 'tonify Lung Qi, transform phlegm, and stop cough' in patterns of Lung deficiency -- chronic non-productive or mildly productive cough, shortness of breath on exertion, weak voice, and susceptibility to respiratory infections. Animal studies demonstrate bronchodilatory and anti-inflammatory effects in the airways. Clinical evidence is based primarily on TCM tradition and small observational studies. Often combined with Astragalus (huang qi) and Schisandra (wu wei zi) in classical formulas.
[1, 2, 3]Exercise-induced respiratory limitations and VO2 max improvement
Hirsch et al. (2017) RCT demonstrated that 3 weeks of C. militaris supplementation (4 g/day of a mushroom blend containing C. militaris) significantly improved maximal oxygen consumption (VO2 max) and ventilatory threshold in young adults compared to placebo. The mechanism is proposed to involve enhanced oxygen delivery via adenosine-mediated vasodilation and improved mitochondrial efficiency. Additional studies support improved aerobic capacity and time to exhaustion. Results are most consistent in studies using fruiting body products rather than mycelium.
[1, 5]Allergic asthma (adjunctive)
Preclinical studies demonstrate that C. militaris extracts reduce airway hyperresponsiveness, eosinophilic infiltration, and Th2 cytokine production (IL-4, IL-5, IL-13) in ovalbumin-induced allergic asthma models. The immunomodulatory action (shifting Th2-dominant toward Th1/Treg balance) provides a theoretical basis for adjunctive use in allergic respiratory conditions. Clinical evidence in human asthma is insufficient for formal recommendation.
[8, 9]Endocrine System
Fatigue and reduced stamina (adrenal and energy support)
A core traditional indication supported by modern clinical trials. Multiple RCTs have demonstrated improvements in subjective energy, exercise performance, and fatigue measures with Cordyceps supplementation. Proposed mechanisms include enhanced mitochondrial ATP production via adenosine receptor modulation, improved oxygen utilization, and HPA axis regulation. Particularly indicated for fatigue associated with chronic illness, aging, overexertion, or convalescence. The adaptogenic classification reflects this broad anti-fatigue action.
[1, 2, 5]Blood glucose regulation (type 2 diabetes, adjunctive)
Preclinical studies demonstrate hypoglycemic effects of C. militaris polysaccharides and cordycepin via multiple mechanisms: activation of AMPK, enhancement of insulin sensitivity, promotion of glucose uptake in skeletal muscle, and inhibition of alpha-glucosidase (reducing postprandial glucose spikes). Cordycepin activates AMPK in a manner analogous to metformin. Small clinical studies (primarily in China) report improvements in fasting blood glucose and HbA1c with Cordyceps supplementation. Evidence is preliminary and insufficient for standalone antidiabetic use.
[8, 9]Cardiovascular System
Cardiovascular tonic and circulatory support
Traditional Chinese medicine uses Cordyceps to 'nourish the Heart and calm the spirit.' Adenosine content provides vasodilatory effects via A2A receptor activation. Preclinical evidence supports cardioprotective effects including improved cardiac output, reduced myocardial oxygen consumption, protection against ischemia-reperfusion injury, and anti-arrhythmic properties. Cordycepin may improve lipid profiles by activating AMPK-mediated fatty acid oxidation. Clinical evidence for specific cardiovascular indications is limited to small observational studies and the pharmacological profiles of individual constituents.
[1, 2, 9]Dyslipidemia (adjunctive)
Cordycepin activates AMPK, a master regulator of cellular energy homeostasis, leading to increased fatty acid oxidation and reduced lipogenesis. Animal studies demonstrate reductions in total cholesterol, LDL-C, and triglycerides with C. militaris supplementation. Small clinical studies support modest lipid-lowering effects. Insufficient evidence for standalone use in dyslipidemia management.
[2, 9]Reproductive System
Reduced libido and sexual dysfunction (traditional Kidney Yang tonic)
Cordyceps is one of the most valued Kidney Yang tonics in Chinese medicine, traditionally used for declining libido, erectile dysfunction, and reproductive insufficiency attributed to Kidney Yang deficiency. Animal studies demonstrate increased testosterone production, enhanced sperm count and motility, and improved erectile function in aged or stressed rodent models. The mechanism may involve stimulation of steroidogenic enzymes and improved testicular blood flow. Human clinical data is limited to small, non-blinded studies in Chinese literature. Often combined with other Kidney Yang tonics (Epimedium, Eucommia) in traditional formulas.
[1, 2, 3]Female reproductive support (traditional)
Traditional Chinese medicine uses Cordyceps for female reproductive patterns including irregular menstruation attributed to Kidney deficiency, infertility, and menopausal symptoms. Proposed mechanisms include modulation of estrogen and progesterone levels and improved ovarian function. Clinical evidence is anecdotal and based on traditional use within TCM practice.
[2, 3]Urinary System
Chronic kidney disease support (adjunctive, renal protection)
Cordyceps has a strong traditional association with kidney health in Chinese medicine (tonifying Kidney Qi and Kidney Yang). Modern preclinical research supports renoprotective effects: cordycepin reduces renal fibrosis (inhibits TGF-beta1/Smad signaling and epithelial-to-mesenchymal transition), polysaccharides protect against nephrotoxicity (gentamicin, cisplatin models), and anti-inflammatory effects reduce renal inflammation. Several small Chinese clinical studies using Cs-4 mycelial preparations reported improvements in serum creatinine, BUN, and proteinuria in CKD patients as adjuncts to standard care. A systematic review by Zhang et al. (2014) concluded that Cordyceps preparations may delay CKD progression but noted low study quality. Insufficient evidence for standalone renal treatment.
[2, 6, 8]Hepatobiliary System
Liver protection and support (hepatoprotection)
Preclinical evidence demonstrates hepatoprotective effects of C. militaris extracts against multiple hepatotoxic insults (CCl4, alcohol, acetaminophen). Cordycepin inhibits hepatic stellate cell activation and collagen deposition (anti-fibrotic), reduces hepatic inflammation, enhances antioxidant enzyme activity, and promotes hepatocyte regeneration. Animal models of NAFLD show reductions in hepatic steatosis and improved liver function markers with Cordyceps supplementation. Clinical data is limited to small studies in Chinese literature. Cordyceps is traditionally paired with Schisandra chinensis for liver support.
[8, 9]Musculoskeletal System
Exercise performance enhancement and recovery
Hirsch et al. (2017) demonstrated statistically significant improvements in VO2 max (+11%) and time to exhaustion with 3 weeks of C. militaris-containing supplementation (4 g/day) in healthy young adults. Additional studies support reduced post-exercise lactate accumulation, faster recovery, and improved anaerobic threshold. Proposed mechanisms include enhanced oxygen delivery (adenosine-mediated vasodilation), improved mitochondrial biogenesis and efficiency (AMPK activation by cordycepin), and anti-inflammatory recovery support. Most relevant for endurance activities. Professional and recreational athletes increasingly use C. militaris supplements. The 1993 Chinese National Games controversy (world records in women's track and field attributed in part to Cordyceps use) brought international attention, though those claims were never scientifically substantiated and later attributed to doping.
[1, 5]Energetics
Temperature
warm
Moisture
neutral
Taste
Tissue States
cold/depression, damp/stagnation
In traditional Chinese medicine, Cordyceps is classified as warm in nature (wen), sweet in taste, and enters the Kidney and Lung channels (gui jing). Its warming quality makes it particularly suited for individuals with cold/deficiency patterns -- cold limbs, fatigue, low libido, chronic cough with clear/white phlegm, and overall depletion. The sweet, bland taste reflects its nourishing, tonic quality and its gentleness on the digestive system. It tonifies both Kidney Yang and Kidney Yin, making it relatively balanced despite its warming nature -- this is unusual among warming tonics and contributes to its reputation as a safe, long-term adaptogen. The neutral moisture quality means it neither excessively dries nor creates dampness. It is considered specific for cold/depression tissue states (low vitality, pale complexion, fatigue, cold sensitivity) and for damp/stagnation patterns in the respiratory system (chronic phlegm, congested lungs). Not typically indicated for hot/excess or inflammatory presentations. CAVEAT: Herbal energetics are interpretive frameworks within traditional medicine systems, not standardized across all practitioners.
Traditional Uses
Traditional Chinese Medicine (TCM)
- Tonify Kidney Yang -- used for lumbar pain, impotence, spermatorrhea, and fatigue due to Kidney Yang deficiency
- Tonify Lung Qi -- used for chronic cough, wheezing, hemoptysis, and shortness of breath due to Lung-Kidney deficiency
- Transform phlegm and stop cough -- for chronic phlegm conditions with weakness
- Nourish Jing (essence) -- used as a longevity tonic to replenish vital essence
- Recovery from chronic illness -- used during convalescence to restore strength, appetite, and vitality
- Support kidney function -- for frequent urination, nocturia, and lower back weakness
- Enhance reproductive function -- for infertility, low libido, and declining sexual function in both men and women
"The Ben Cao Cong Xin (New Compilation of Materia Medica, 1757) by Wu Yiluo provides one of the earliest systematic descriptions: 'Cordyceps protects the Lungs and enriches the Kidneys, stops bleeding and transforms phlegm, and is used for consumptive cough.' The Ben Cao Bei Yao (Essentials of Materia Medica, 1694) states it 'is sweet and warm, entering the Lung and Kidney channels.' The Qing dynasty text Ben Cao Gang Mu Shi Yi (Supplement to the Compendium of Materia Medica, 1765) by Zhao Xuemin provides detailed clinical guidance, noting its use 'for deficient taxation, cough with hemoptysis, and for generating essence and enriching marrow.'"
Tibetan medicine (Sowa Rigpa)
- Known as 'yartsa gunbu' (summer grass, winter worm) in Tibetan
- Used as a rejuvenating tonic for general weakness and convalescence
- Treatment for respiratory conditions, particularly chronic cough and tuberculosis
- Enhancement of vitality and physical endurance at high altitude
- Aphrodisiac and reproductive tonic
- Highly valued trade commodity between Tibet and China for centuries
"Tibetan medical texts describe yartsa gunbu as a precious tonic. The earliest known Tibetan reference dates to the 15th century text 'An Ocean of Aphrodisiacal Qualities' by Zurkhar Nyamnyi Dorje (1439-1475), which describes Cordyceps as a cure-all tonic. Tibetan and Nepali herders have used Cordyceps to improve livestock vitality for centuries."
Japanese Kampo and folk medicine
- Known as 'tochukaso' in Japanese
- Used as a vitality tonic for fatigue and aging
- Support for respiratory conditions and chronic cough
- Enhancement of physical stamina and athletic performance
- General health maintenance and longevity support
"Japanese interest in Cordyceps expanded significantly following the commercial cultivation of C. militaris by Japanese mycologists in the late 20th century. Cultivation made previously rare and expensive Cordyceps preparations accessible for regular supplementation. In Japanese practice, Cordyceps is valued primarily as a stamina and vitality tonic."
[2]
Korean traditional medicine
- Known as 'dong chung ha cho' in Korean
- Used as a tonic for depleted constitutions
- Respiratory support for chronic cough and asthma
- Enhancement of immune resistance
- Anti-aging and longevity tonic
- Support for renal function
"Korean traditional medicine shares the TCM classification of Cordyceps as a Kidney-Lung tonic. South Korea has become a major center for C. militaris cultivation research and commercial production, with Korean studies contributing substantially to the modern evidence base for C. militaris bioactivity and safety."
Modern Research
Cordyceps militaris supplementation and aerobic exercise performance (VO2 max)
Randomized, double-blind, placebo-controlled trial examining the effect of a mushroom blend containing C. militaris (4 g/day for 3 weeks) on aerobic performance in 28 healthy young adults.
Findings: Compared to placebo, the C. militaris group demonstrated a statistically significant increase in maximal oxygen consumption (VO2 max), with a mean improvement of approximately 11% (P < 0.05). Ventilatory threshold and time to exhaustion during incremental cycling also improved significantly. No adverse effects were reported. The authors attributed the performance enhancement to improved oxygen utilization, potentially mediated by adenosine and cordycepin content.
Limitations: Small sample size (n=28). The supplement was a mushroom blend, not pure C. militaris (though C. militaris was the primary component). Short supplementation period (3 weeks). Young, healthy, recreationally active participants; results may not generalize to trained athletes or older adults. Single-center study.
[5]
Cordycepin as a broad-spectrum anti-inflammatory and antitumor agent
Comprehensive narrative review of the pharmacological properties of cordycepin (3'-deoxyadenosine), the signature bioactive compound of Cordyceps, covering anti-inflammatory, anticancer, immunomodulatory, antioxidant, anti-microbial, and anti-aging activities across preclinical studies.
Findings: Cordycepin demonstrates multi-target pharmacological activity: (1) Anti-inflammatory -- inhibits NF-kB, suppresses TNF-alpha, IL-1beta, IL-6, COX-2, iNOS. (2) Anticancer -- induces apoptosis via mitochondrial and death receptor pathways, arrests cell cycle at G0/G1 or G2/M phases, inhibits migration and invasion via MMP suppression, active across lung, breast, colon, prostate, liver, and leukemia cell lines. (3) Immunomodulatory -- enhances NK cell activity and macrophage phagocytosis while suppressing excessive inflammatory responses. (4) Antioxidant -- scavenges ROS, upregulates Nrf2 pathway. (5) Neuroprotective -- protects against glutamate excitotoxicity and neuroinflammation. Mechanistically, cordycepin acts as an adenosine analogue, RNA chain terminator, and AMPK activator.
Limitations: Review heavily weighted toward in vitro and animal studies. Direct clinical translation of cordycepin pharmacology is limited by rapid in vivo deamination by adenosine deaminase. Bioavailability and therapeutic dosing in humans remain poorly defined. Heterogeneity of Cordyceps preparations across studies.
[9]
Medicinal properties of Cordyceps: comprehensive review of biological activities
Broad narrative review covering the ethnopharmacology, bioactive constituents, and biological activities of Cordyceps species (C. sinensis and C. militaris), integrating traditional use with modern preclinical and clinical evidence.
Findings: Identified and categorized major bioactivities: immunomodulatory (polysaccharide-mediated innate immune activation and adaptive immune regulation), anti-inflammatory (NF-kB pathway inhibition), antitumor (both direct cytotoxic and immune-mediated), antioxidant (radical scavenging and antioxidant enzyme induction), hypoglycemic (AMPK activation, alpha-glucosidase inhibition), hepatoprotective and nephroprotective (anti-fibrotic, antioxidant), cardiovascular (vasodilatory, anti-arrhythmic), and antimicrobial activities. Noted that C. militaris can produce equivalent or higher concentrations of cordycepin compared to wild C. sinensis, supporting its use as a sustainable, cultivated substitute.
Limitations: Narrative format without systematic search methodology. Many cited studies are preclinical. Some studies used commercial Cs-4 fermentation products rather than C. militaris fruiting bodies, limiting direct applicability. Variable quality of cited clinical studies, particularly older Chinese-language publications.
[8]
Cordyceps militaris immunomodulatory effects in vitro and in vivo
Experimental study investigating the immunomodulatory effects of C. militaris hot water extract on murine macrophages (RAW 264.7) and in cyclophosphamide-immunosuppressed mice.
Findings: C. militaris extract significantly enhanced macrophage phagocytic activity and NO production in a dose-dependent manner. In immunosuppressed mice, oral administration of C. militaris extract (100-400 mg/kg/day for 10 days) restored white blood cell counts, splenic lymphocyte proliferation, and NK cell activity toward normal levels. The immunostimulatory activity was attributed primarily to beta-glucan polysaccharides. The extract also modulated cytokine production, increasing IFN-gamma (Th1) while having a balancing effect on IL-4 (Th2).
Limitations: Murine model; direct extrapolation to human immunology requires caution. Dosing in mg/kg in mice does not directly translate to human equivalent doses. Immunosuppression was chemically induced (cyclophosphamide), which may not fully model clinical immunodeficiency. Single extract preparation tested.
[7]
Cordycepin inhibits NF-kB activation and inflammatory gene expression
In vitro study examining the mechanism of cordycepin's anti-inflammatory activity in LPS-stimulated murine macrophages, focusing on the NF-kB signaling pathway.
Findings: Cordycepin (10-50 micromolar) dose-dependently inhibited LPS-induced expression of iNOS, COX-2, TNF-alpha, and IL-1beta in RAW 264.7 macrophages. Mechanistic investigation revealed that cordycepin suppressed NF-kB activation by inhibiting phosphorylation and degradation of IkB-alpha, thereby preventing nuclear translocation of NF-kB p65 subunit. Cordycepin also inhibited phosphorylation of Akt and p38 MAPK signaling intermediates. The anti-inflammatory potency was significant at concentrations achievable with high-dose supplementation.
Limitations: In vitro macrophage model. Concentrations used may not reflect achievable tissue levels after oral dosing of Cordyceps preparations. Purified cordycepin was used, not whole fungal extract. Does not account for in vivo metabolism (deamination by adenosine deaminase).
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Systematic review of Cordyceps preparations for chronic kidney disease
Systematic review and meta-analysis of randomized and quasi-randomized controlled trials evaluating Cordyceps preparations (various formulations) as adjunctive therapy for chronic kidney disease (CKD).
Findings: Twenty-two studies (n=1,746 participants) met inclusion criteria. Cordyceps preparations (primarily Cs-4 mycelium and related products) as adjuncts to conventional treatment were associated with statistically significant improvements in serum creatinine (weighted mean difference -55.58 micromol/L, 95% CI -82.18 to -28.99), creatinine clearance, and 24-hour urinary protein excretion compared to conventional treatment alone. Improvements were also observed in serum albumin and hemoglobin levels.
Limitations: All included studies were conducted in China and published in Chinese-language journals. Most had high risk of bias (poor allocation concealment, inadequate blinding, small sample sizes). Heterogeneity in Cordyceps preparations used across studies (different species, cultivation methods, dosages). The authors concluded that while results are promising, well-designed, multicenter RCTs are needed to confirm efficacy and determine optimal dosing. Most studies used Cs-4 mycelium rather than C. militaris fruiting body specifically.
[6]
Cordycepin antitumor activity: mechanisms and evidence across cancer types
Review of cordycepin's anticancer properties based on in vitro and in vivo studies across multiple cancer types, focusing on molecular mechanisms of action.
Findings: Cordycepin demonstrates antiproliferative and pro-apoptotic activity against cancer cell lines including lung (A549), breast (MCF-7, MDA-MB-231), colon (HT-29, HCT116), prostate (LNCaP, PC3), liver (HepG2), gastric, and leukemia cells. Key mechanisms include: (1) induction of apoptosis via caspase-3/7/9 activation and Bax/Bcl-2 ratio alteration, (2) cell cycle arrest via CDK inhibitor upregulation, (3) inhibition of mTOR/S6K and PI3K/Akt signaling, (4) suppression of MMP-2/9 and metastasis-related gene expression, (5) inhibition of angiogenesis via VEGF suppression, and (6) activation of AMPK. In vivo, cordycepin reduced tumor growth and metastasis in xenograft models at doses of 15-50 mg/kg. Synergistic effects with certain chemotherapy agents (cisplatin, 5-fluorouracil) have been demonstrated.
Limitations: Predominantly preclinical data. No published Phase II/III clinical trials of cordycepin as a cancer therapeutic. In vivo doses used are substantially higher than those achievable through dietary supplementation. Rapid metabolic degradation by adenosine deaminase limits systemic bioavailability. The antitumor evidence does not support marketing Cordyceps supplements as cancer treatments.
Pharmacological profile of Cordyceps sinensis and related species: clinical overview
Comprehensive monographic review by Zhu et al. covering the pharmacology, traditional use, constituent chemistry, and clinical applications of Cordyceps species, drawing from both Chinese-language and English-language literature.
Findings: Documented broad pharmacological profile including: enhancement of physical performance (increased ATP synthesis, improved oxygen utilization), immunomodulation (bidirectional -- enhancing immunodeficiency while dampening autoimmune hyperactivity), renoprotective effects (improved creatinine clearance, reduced proteinuria in CKD patients), hepatoprotective effects (reduced ALT/AST in hepatitis patients), cardiovascular effects (improved cardiac output, anti-arrhythmic), respiratory support (bronchodilation, reduced airway hyperreactivity), reproductive enhancement (increased testosterone and sperm parameters), and anti-aging properties. Compiled data from multiple small Chinese clinical trials reporting benefits in CKD, hepatitis B, cardiac arrhythmias, and hyperlipidemia.
Limitations: Review predates modern standards for systematic reviews. Many cited clinical studies are small, single-center, and poorly controlled by Western evidence standards. Most clinical data pertains to C. sinensis and Cs-4 mycelium rather than C. militaris specifically. Some cited studies lack adequate blinding and randomization. Despite these limitations, this review remains one of the most comprehensive English-language compilations of Cordyceps pharmacology.
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Preparations & Dosage
Capsule / Powder
Strength: Crude dried fruiting body powder, 500-600 mg per capsule. Quality products should specify cordycepin content (typically 0.2-1.0% or 1-5 mg per capsule) and beta-glucan content (greater than 20%).
Dried C. militaris fruiting body, finely powdered and encapsulated. Select products verified for cordycepin and beta-glucan content. Fruiting body products are preferred over mycelium-on-grain (MOG) products, which may contain significant residual grain starch. Look for products with third-party testing (beta-glucan content greater than 20%, alpha-glucan content less than 5%).
1000-3000 mg dried fruiting body powder daily in divided doses (typically 2-3 capsules of 500 mg, taken 2-3 times daily). For exercise performance: 1000-4000 mg daily beginning 1-3 weeks before target event, based on clinical trial dosing (Hirsch 2017).
Divided into 2-3 doses daily, taken with food
May be used long-term as a daily tonic supplement. Traditional use supports extended supplementation (months to years). Reassess therapeutic goals periodically.
Not well-established. Insufficient pediatric clinical data. Generally not recommended for children under 12 without practitioner guidance.
The most common modern preparation and the form closest to clinical trial products. Capsule delivery bypasses the mild earthy taste that some find objectionable. Fruiting body capsules are preferred over mycelium-on-grain products for therapeutic purposes due to higher cordycepin concentrations and lower grain filler content. Products should be tested for heavy metals, pesticides, and microbial contamination. USDA Organic and third-party tested products are recommended.
Standardized Extract
Strength: DER typically 8:1 to 15:1. Quality specifications: cordycepin greater than 0.5% (5 mg/g), beta-glucan greater than 25%, adenosine greater than 0.1%.
Hot water or dual-extraction (hot water + ethanol) concentrated extract of C. militaris fruiting body, standardized to cordycepin and/or beta-glucan content. Typically available as capsules or powder. Hot water extraction solubilizes polysaccharides (beta-glucans); ethanol co-extraction captures additional lipophilic compounds (ergosterol, cordycepin). Dual extraction is considered optimal for capturing the full spectrum of bioactives.
500-1500 mg standardized extract daily in divided doses. Dosing depends on extraction ratio (DER) -- a 10:1 extract at 500 mg approximates 5000 mg of crude material.
1-3 times daily with food
Long-term use is traditional and generally well-tolerated. Re-evaluate after 8-12 weeks for specific therapeutic goals.
Not established for standardized extracts
Standardized extracts provide the most consistent and quantified dosing of bioactive compounds. The dual-extraction method is considered superior to either hot water or ethanol extraction alone for comprehensive bioactive recovery. Cordycepin content and beta-glucan content should both be declared on the product label. Avoid products that list only 'polysaccharide' content without specifying beta-glucan, as total polysaccharides may include non-bioactive alpha-glucan starch from grain substrates.
Decoction
Strength: 3-9 g dried fruiting body per 500-600 mL water (approximately 0.6-1.5% decoction)
Add 3-6 g of dried C. militaris fruiting bodies (whole or sliced) to 500-600 mL of water. Bring to a boil, then reduce heat and simmer gently for 30-45 minutes. Strain and drink the liquid. The spent fruiting bodies may be simmered a second time for a weaker extraction. In traditional Chinese practice, Cordyceps is often decocted with other herbs (e.g., Astragalus, Jujube, Goji berry) or simmered with chicken, duck, or pork in medicinal soups (yao shan -- food as medicine).
3-9 g of dried fruiting body daily, prepared as decoction. Drink in 2-3 portions throughout the day.
1-2 times daily
May be used for extended courses (weeks to months), particularly during convalescence or as a seasonal tonic.
Not well-established for decoction. Consult TCM practitioner for pediatric dosing.
The traditional preparation method in Chinese medicine. Decoction effectively extracts polysaccharides (beta-glucans) and water-soluble nucleosides (adenosine, some cordycepin). However, some cordycepin may degrade during prolonged boiling. Moderate simmering (not vigorous boiling) for 30-45 minutes is recommended. The decoction has a mild, slightly sweet, earthy flavor. Traditional Chinese formulas often combine Cordyceps with complementary herbs -- a classic formula for Lung-Kidney deficiency cough combines Cordyceps with Astragalus (huang qi), Ophiopogon (mai men dong), and Schisandra (wu wei zi).
Tincture
Strength: 1:5, 40-50% ethanol (dried fruiting body). Double-extraction versions combine aqueous and ethanolic extracts.
Hydroethanolic extraction of dried C. militaris fruiting body. Standard ratio 1:5 in 40-50% ethanol. Macerate powdered or finely chopped fruiting bodies for 4-6 weeks with daily agitation, then press and filter. A double-extraction approach (hot water extraction followed by alcohol maceration of the marc, then combining both extracts) captures both water-soluble polysaccharides and alcohol-soluble compounds.
2-4 mL (40-80 drops) three times daily
Three times daily, taken in water or juice
May be used for extended periods. Reassess therapeutic goals periodically.
Not recommended for children in tincture form due to alcohol content
Tinctures offer convenient, portable dosing with rapid absorption. Ethanol effectively extracts cordycepin, adenosine, and other nucleosides. However, pure ethanol extraction is suboptimal for high-molecular-weight polysaccharides (beta-glucans), which require hot water for solubilization. A dual-extraction tincture (combining hot water decoction with alcohol maceration) provides more comprehensive extraction. Some commercial tinctures now use this approach.
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Infusion (Tea)
Strength: 2-4 g dried powder per 200-250 mL water
While less traditional than decoction for mushrooms, a hot water infusion can be prepared by steeping 2-4 g of finely powdered C. militaris fruiting body in 200-250 mL of just-boiled water for 10-15 minutes, covered. Stir or shake occasionally. The powder does not fully dissolve -- the suspension can be consumed whole, or the liquid can be strained.
200-250 mL prepared from 2-4 g powder, 1-2 times daily
1-2 times daily
Suitable for regular daily use
Not established
Infusion is a simpler preparation than decoction but less efficient for extracting polysaccharides from the tough fungal cell walls (which contain chitin). If using this method, finely powdered fruiting body is essential for adequate extraction. Some practitioners recommend consuming the powder along with the liquid to capture all bioactives. Cordyceps powder is also commonly added to coffee, smoothies, and other beverages as a daily wellness tonic -- this approach is popular in modern functional mushroom products but extraction efficiency is variable.
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Safety & Interactions
Class 1
Can be safely consumed when used appropriately (AHPA Botanical Safety Handbook)
Contraindications
Although rare, allergic reactions to Cordyceps supplements have been reported, including skin rash and gastrointestinal distress. Individuals with known fungal allergies should exercise caution. Cross-reactivity with mold allergies is theoretically possible given shared fungal allergens.
Due to the potent immunomodulatory activity of C. militaris (particularly beta-glucan-mediated immune activation), caution is warranted in individuals with active autoimmune conditions (systemic lupus erythematosus, multiple sclerosis, rheumatoid arthritis). While Cordyceps has bidirectional immunomodulatory properties (not purely stimulatory), the effect on autoimmune conditions is unpredictable and should be monitored by a qualified practitioner. Some preclinical evidence suggests anti-inflammatory effects that could theoretically benefit autoimmune inflammation, but clinical data is insufficient.
Drug Interactions
| Drug / Class | Severity | Mechanism |
|---|---|---|
| Warfarin, heparin, and other anticoagulants (Anticoagulants) | theoretical | Cordycepin may inhibit platelet aggregation via adenosine receptor activation and modulation of thromboxane A2 synthesis. Adenosine itself inhibits platelet activation via A2A receptor signaling. In vitro, Cordyceps extracts have demonstrated antiplatelet activity. Theoretical risk of enhanced bleeding when combined with anticoagulant medications. |
| Cyclosporine, tacrolimus, and other immunosuppressants (Immunosuppressants) | theoretical | The immunostimulatory properties of C. militaris (beta-glucan-mediated NK cell and macrophage activation, enhanced lymphocyte proliferation) could theoretically counteract the effects of immunosuppressant drugs. Conversely, some anti-inflammatory effects of cordycepin (NF-kB inhibition) could have an additive immunosuppressive effect. The net immunological impact is unpredictable. |
| Antiplatelet agents (aspirin, clopidogrel, ticagrelor) (Antiplatelet drugs) | theoretical | Additive inhibition of platelet aggregation. Both cordycepin and adenosine modulate platelet function via adenosine receptor signaling. Combined use could theoretically increase bleeding risk. |
| Insulin, metformin, sulfonylureas, and other hypoglycemic agents (Antidiabetic medications) | theoretical | Cordycepin activates AMPK (similar to metformin mechanism), and C. militaris polysaccharides have demonstrated hypoglycemic effects in animal models via enhanced insulin sensitivity and alpha-glucosidase inhibition. Additive blood glucose lowering is theoretically possible. |
Pregnancy & Lactation
Pregnancy
insufficient data
Lactation
insufficient data
There are no controlled human studies of C. militaris use during pregnancy or lactation. Animal reproductive toxicity studies are limited. While Cordyceps has a long history of use in Chinese medicine, it is not traditionally considered a specific pregnancy herb, and traditional texts do not include it among remedies for pregnancy-related conditions. The immunomodulatory and adenosine-modulating effects represent theoretical concerns during pregnancy. As a precaution, C. militaris supplementation should be avoided during pregnancy and lactation unless specifically recommended by a qualified healthcare provider. Some TCM practitioners use small doses of Cordyceps during pregnancy for kidney-deficiency patterns, but this should only be done under expert supervision.
Adverse Effects
References
Monograph Sources
- [1] Chen PX, Wang S, Nie S, Marcone M. Properties of Cordyceps sinensis: A review. J Funct Foods (2013) ; 5 : 550-569 . DOI: 10.1016/j.jff.2013.01.034
- [2] Zhu JS, Halpern GM, Jones K. The scientific rediscovery of an ancient Chinese herbal medicine: Cordyceps sinensis Part I and Part II. J Altern Complement Med (1998) ; 4 : 289-303 (Part I), 429-457 (Part II) . DOI: 10.1089/acm.1998.4.3-289 . PMID: 9764768
- [3] Bensky D, Clavey S, Stoger E. Chinese Herbal Medicine: Materia Medica (3rd edition). Eastland Press, Seattle, WA (2004) . ISBN: 978-0939616428
- [4] Winkler D. Yartsa Gunbu (Cordyceps sinensis) and the fungal commodification of Tibet's rural economy. Econ Bot (2008) ; 62 : 291-305 . DOI: 10.1007/s12231-008-9038-3
Clinical Studies
- [5] Hirsch KR, Smith-Ryan AE, Roelofs EJ, Trexler ET, Mock MG. Cordyceps militaris improves tolerance to high-intensity exercise after acute and chronic supplementation. J Diet Suppl (2017) ; 14 : 42-53 . DOI: 10.1080/19390211.2016.1203386 . PMID: 27408987
- [6] Zhang HW, Lin ZX, Tung YS, Kwan TH, Mok CK, Leung C, Chan LS. Cordyceps sinensis (a traditional Chinese medicine) for treating chronic kidney disease. Cochrane Database Syst Rev (2014) ; 12 : CD008353 . DOI: 10.1002/14651858.CD008353.pub2 . PMID: 25519252
- [7] Lee JS, Kwon DS, Lee KR, Park JM, Ha SJ, Hong EK. Mechanism of macrophage activation induced by polysaccharide from Cordyceps militaris culture broth. Carbohydr Polym (2015) ; 120 : 29-37 . DOI: 10.1016/j.carbpol.2014.11.059 . PMID: 25662684
Traditional Texts
- [8] Das SK, Masuda M, Sakurai A, Sakakibara M. Medicinal uses of the mushroom Cordyceps militaris: current state and prospects. Fitoterapia (2010) ; 81 : 961-968 . DOI: 10.1016/j.fitote.2010.07.010 . PMID: 20650308
- [9] Tuli HS, Sharma AK, Sandhu SS, Kashyap D. Cordycepin: a bioactive metabolite with therapeutic potential. Life Sci (2014) ; 93 : 863-869 . DOI: 10.1016/j.lfs.2013.09.030 . PMID: 24121015
- [10] Yue K, Ye M, Zhou Z, Sun W, Lin X. The genus Cordyceps: a chemical and pharmacological review. J Pharm Pharmacol (2013) ; 65 : 474-493 . DOI: 10.1111/j.2042-7158.2012.01601.x . PMID: 23488776
Pharmacopeias & Reviews
- [11] Kim HG, Shrestha B, Lim SY, Yoon DH, Chang WC, Shin DJ, Han SK, Park SM, Park JH, Park HI, Sung JM, Jang Y, Chung N, Hwang KC, Kim TW. Cordycepin inhibits lipopolysaccharide-induced inflammation by the suppression of NF-kappaB through Akt and p38 inhibition in RAW 264.7 macrophage cells. Eur J Pharmacol (2006) ; 545 : 192-199 . DOI: 10.1016/j.ejphar.2006.06.047 . PMID: 16899239
Last updated: 2026-03-01 | Status: published
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