Cordyceps sinensis · Cs-4 · Caterpillar Fungus
1000 mg · vegan · gluten-free · 60 caps
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A parasitic fungus that grows on insect larvae in high-altitude regions of Tibet and Nepal. Most modern supplements use cultivated Cordyceps militaris or a fermented mycelial extract (Cs-4), not the wild-harvested Ophiocordyceps sinensis, which is prohibitively expensive and ecologically threatened.
Cordycepin and polysaccharides may improve oxygen utilization, ATP production, and lactate clearance. The mechanism is thought to involve enhanced mitochondrial efficiency and vascular endothelial function — but human clinical data is thinner than the marketing suggests.
Older adults seeking exercise capacity support · people in high-altitude or low-oxygen environments · those wanting a non-stimulant energy adjunct · athletes curious about traditional ergogenic tonics.
Autoimmune conditions (theoretical immune-modulating concern — though evidence is weak), bleeding disorders (mild anticoagulant effect reported in vitro), surgery (discontinue 2 weeks prior), MAOIs (theoretical interaction with cordycepin).
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✓ Morning for energy support
Flexible — works in any of the above.
Cordyceps polysaccharides and cordycepin may enhance mitochondrial ATP generation and improve oxygen extraction during exercise. The mechanism is better characterized in animal models than in humans.
From cited keystone trials. Mixed picture — positive in elderly, null in trained athletes.
Modeled trajectory based on cited keystone trials
Metabolic threshold. Improvements emerge gradually; most gain by week 8–12.
n=20 · 12 weeks · 333 mg Cs-4 TID
→ Metabolic threshold ↑ 10.5% (p<<0.02); ventilatory threshold ↑ 8.5% (p<<0.02); VO2max unchanged
n=22 male cyclists · 5 weeks · 3 g/day
→ No improvement in oxidative capacity or endurance performance vs placebo
n=8 · crossover · 4 weeks
→ No significant effect on muscle tissue oxygen saturation or cycling performance
C · C+ for exercise performance in elderly (one positive RCT, but small and in a specific population). C for trained athletes (multiple null trials). C for immune modulation (traditional use strong, clinical RCTs thin). Safety is good in trials up to 12 weeks. The evidence base is genuinely thinner than marketing implies — this is not creatine or beta-alanine.
A plain-English read of the literature behind this supplement. Not a clinical recommendation.
Cordyceps occupies an odd space in modern supplementation: a traditional Chinese tonic with genuine pharmacological interest but a clinical evidence base that doesn't match the marketing hype. The key distinction most consumers miss is that virtually no supplement contains wild Ophiocordyceps sinensis — it's ecologically threatened and costs more per gram than gold. What you're buying is either a fermented mycelial extract (Cs-4) or cultivated Cordyceps militaris. Both are valid; neither is the legendary Himalayan fungus.
The Chen 2010 trial is the most-cited positive study: 20 healthy elderly adults (ages 50–75) took 333 mg Cs-4 three times daily for 12 weeks. Metabolic threshold improved 10.5% and ventilatory threshold 8.5% — meaningful for older adults wanting to maintain exercise capacity. But VO2max didn't budge, and the trial was small.
The problem is the athlete trials. Parcell 2004 gave 22 male cyclists 3 g/day Cs-4 for 5 weeks and found nothing. Earnest 2004 tested a commercial herbal formula with cordyceps in cyclists — nothing. Colson 2005 tested cordyceps plus rhodiola in cyclists — nothing on muscle oxygen saturation or performance. The pattern is consistent: if you're already trained, cordyceps doesn't add much.
The immune and anti-fatigue claims have even less RCT support. A few small studies show increased NK cell activity and reduced oxidative stress markers, but the trial quality is low and sample sizes are tiny. The Klupp 2015 Cochrane review on reishi for cancer is sometimes cited in cordyceps marketing by association — that's a different mushroom.
Practical guidance: 1000–3000 mg/day of a Cs-4 or militaris extract from a reputable source (Real Mushrooms, Host Defense, Nootropics Depot). Expect modest benefits if you're older or untrained; don't expect ergogenic magic if you're already fit. The traditional tonic framing — gentle support, not dramatic intervention — is closer to the evidence than the supplement industry's performance claims.
Keystone references: Chen et al. 2010 (J Altern Complement Med, PMID 20804368 — elderly exercise trial); Parcell et al. 2004 (Int J Sport Nutr Exerc Metab, PMID 15118196 — null cyclist trial); Colson et al. 2005 (J Strength Cond Res, PMID 15903375 — null cyclist trial with rhodiola).
How to use Cordyceps specifically for Fatigue — the right dose, timing, blood markers to track, and how to know if it is working.
A clinical evidence review of Cordyceps — RCT data, effect sizes, evidence grade, and what the numbers mean for your specific situation.
Everything you need to know about Cordyceps — mechanism, dose, safety, buying guide for India, and what the research actually says.
Three thousand years of reverence in Traditional Chinese Medicine — but the modern RCT evidence for sleep, immune, and cancer adjuvant use is genuinely thin.
BUY →The most evidence-backed sports supplement — 5g/day increases strength, muscle mass, and emerging cognitive data in aging adults
BUY →SacredBod's longer take on Cordyceps — context the structured blocks above don't capture.
Cordyceps is a traditional Chinese tonic with genuine pharmacological interest and a clinical evidence base that doesn’t match the marketing. The first thing to know: virtually no supplement contains wild Ophiocordyceps sinensis. It’s ecologically threatened and costs more per gram than gold. What you’re buying is either a fermented mycelial extract (Cs-4) or cultivated Cordyceps militaris. Both are valid; neither is the legendary Himalayan fungus.
The Chen 2010 trial is the best positive evidence: 20 healthy elderly adults took 333 mg Cs-4 three times daily for 12 weeks. Metabolic threshold improved 10.5% and ventilatory threshold 8.5% — meaningful for maintaining exercise capacity with age. But VO2max didn’t change, and the trial was small.
The athlete data is less encouraging. Parcell 2004 (22 cyclists, 5 weeks, 3 g/day), Earnest 2004 (commercial formula with cordyceps), and Colson 2005 (cordyceps plus rhodiola) all found no endurance benefit in trained cyclists. The pattern is consistent: cordyceps may help if you’re older or untrained; it doesn’t add performance if you’re already fit.
The immune and anti-fatigue claims have even less RCT support. A few small studies show increased NK cell activity, but trial quality is low. Traditional use is strong; modern clinical validation is thin.
Practical guidance: 1000–3000 mg/day of Cs-4 or militaris extract from a reputable, third-party-tested source. Expect gentle support, not dramatic intervention. The traditional tonic framing is closer to the evidence than the supplement industry’s performance claims.
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