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Cordyceps militaris / Cordyceps sinensis
A traditional fungus marketed for energy and endurance. The honest verdict: those claims rest on small, often-mixed trials — several found no benefit — while the stronger evidence covers adjuvant kidney and COPD use instead.
What the evidence says
Cordyceps doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from high-quality meta-analyses and randomised trials published 2002–2026 with a typical study size of 62 participants.
Based on 58 studies · 10 meta-analyses · 27 RCTs · 5,187 total participants
Confidence
High confidenceBy outcome
Sits at Emerging 4.5 because the headline energy and endurance claims rest on small, often-mixed RCTs, while the larger meta-analyses cover adjuvant kidney and COPD use rather than the marketed benefits.
15 randomised trials
every one checked individually
Every randomised or controlled trial of Cordyceps indexed in PubMed, not a hand-picked subset. Meta-analyses and systematic reviews are deliberately excluded from this count: most of them cover many compounds at once, so counting them would inflate it.
PubMed · as of Jul 2026
7 trials ongoing or recruiting · 22 completed on ClinicalTrials.gov
Registered trials show research momentum for Cordyceps, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Oct 2026
Under EU law (Reg. 1924/2006), EFSA reviews whether a specific health claim for Cordyceps meets the evidence standard. These are independent regulatory decisions on claims — not studies, and never counted toward the evidence score above.
Not authorised by EFSA
“Cordyceps sinensis-fungus larvae-mycelium Free radicals neutralisation actions”
“Not authorised” means the specific claim wording did not meet the EU’s evidence standard — often a matter of dossier or phrasing, not proof of no effect. EFSA judges marketing claims and is kept separate from our study-based evidence score.
Source: EU Register of nutrition and health claims (European Commission / EFSA) · register snapshot Feb 2013
Cordyceps is a genus of parasitic fungi used in traditional Chinese medicine for centuries.
It is heavily marketed for energy, endurance, and oxygen utilization, but the human evidence for those benefits is thin: the exercise trials are very small (often under 30 people), frequently use multi-ingredient blends, and several found no improvement in VO2max or time to exhaustion.
The larger meta-analyses are about adjuvant use in chronic kidney disease and COPD, not athletic performance. There are also RCTs showing NK-cell immune activity. Cordyceps militaris is now cultivated and more accessible than wild Cordyceps sinensis.
May enhance cellular energy production
May improve how efficiently the body uses oxygen
How Cordyceps works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Insufficient data; avoid
May increase bleeding risk
May affect immune function
May lower blood glucose additively; monitor blood sugar
Tip: Take with food
Tip: Stay hydrated
Cordyceps has an evidence score of 4.5/10 — emerging evidence based on 57 indexed studies, including 6 meta-analyses. A traditional fungus marketed for energy and endurance. The honest verdict: those claims rest on small, often-mixed trials — several found no benefit — while the stronger evidence covers adjuvant kidney and COPD use instead. Representative study: PMID 38484953.
The commonly studied dose of Cordyceps is 1000-3000mg (no cited trial states the dose it used). Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Cordyceps is in the morning. Taking it with food is preferred. Cordyceps contains cordycepin (3'-deoxyadenosine), polysaccharides, and adenosine analogs that support oxygen utilization, ATP production, and endurance capacity.
Cordyceps is generally well-tolerated and considered safe for most healthy adults at recommended doses. Reported side effects are uncommon and include GI discomfort, dry mouth. Use caution if any of these apply to you: Bleeding disorders; Autoimmune conditions (use with caution).
CoQ10
Likely helpsA lipid-soluble antioxidant central to mitochondrial energy production, with the strongest trial support for fertility/IVF outcomes and heart failure.
Ashwagandha
Likely helpsReduces cortisol and anxiety while improving sleep quality and physical recovery in stressed adults.
Beetroot
Likely helpsDietary nitrates convert to nitric oxide, enhancing oxygen delivery to muscles — a top-5 evidence-based ergogenic aid.
Citrulline Malate
Probably helpsCombines citrulline for nitric oxide production with malic acid for ATP synthesis — reduces fatigue and enhances exercise endurance.
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Reviewed by Dr. Baher Al Hakim · Last reviewed May 2026 · evidence from 58 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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