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β-glucan 375mgper serving £1.67mycelium
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Buying Cordyceps in a Mushroom Capsule: what the research says
Cordyceps is unique among functional mushrooms in targeting energy and athletic performance rather than immune or cognitive outcomes. The key active compound, cordycepin (3'-deoxyadenosine), enhances ATP production and oxygen utilisation — the mechanisms studied in trials examining VO₂ max and exercise endurance. Modern supplements use Cordyceps militaris (lab-cultivated) rather than the rare and expensive wild Cordyceps sinensis. Militaris can be cultivated to contain higher and more consistent cordycepin levels than sinensis, making it the better choice for supplementation. Effective doses in human trials start at 1,000 mg per day, with some studies using 3,000 mg. As with all functional mushrooms, the distinction between fruiting body extract and mycelium-on-grain significantly affects cordycepin content.
What to look for
- 1.Cordyceps militaris as the species — more consistent cordycepin content than sinensis
- 2.Fruiting body or dual-extracted product with declared cordycepin or beta-glucan content
- 3.Dose of at least 1,000 mg per serving — below this threshold most clinical evidence does not apply
What matters in a mushroom capsule
- 01Capsule size and serving count: a standard capsule holds 500–700 mg. For ingredients requiring 1,000–3,000 mg per day (cordyceps, reishi), check whether the serving size is 1 capsule or 2–4. Some brands quote per-capsule amounts that require 4 daily capsules to reach clinical dose — making per-day cost and pill burden considerably higher than they appear.
- 02Extract vs. whole mushroom powder: capsules can contain either extracted or non-extracted mushroom material. Extract capsules (10:1, 8:1) are more concentrated; ensure the dose in mg refers to the extract, not the pre-extraction equivalent weight, to compare products accurately.
- 03Third-party testing declaration: for capsule products, look for brands that display a current Certificate of Analysis on their website, confirming the contents match the label. This is the clearest indicator of manufacturing quality and transparency.
Want to go deeper on the research behind Cordyceps?
Read the Cordyceps evidence guide →Cordyceps Mushroom Capsule questions answered
What is the difference between Cordyceps militaris and Cordyceps sinensis?+
Cordyceps sinensis is the rare, wild-harvested caterpillar fungus from the Tibetan Plateau — historically valuable but prohibitively expensive and now rarely used in commercial supplements. Cordyceps militaris is the cultivated species most commonly found in supplements today. Militaris can be grown to contain higher and more consistent levels of cordycepin (the key active compound) than sinensis, and most modern clinical trials use militaris. A product labelled 'Cordyceps' without specifying the species is almost certainly militaris — which is fine, but transparency about the species is a quality signal.
Can Cordyceps improve athletic performance?+
Several human trials have found improvements in VO₂ max, time to exhaustion, and aerobic capacity in both older adults and trained athletes using Cordyceps militaris at doses of 1,000–3,000 mg per day over 3–6 weeks. The proposed mechanism is enhanced ATP production and improved oxygen utilisation via cordycepin. Results are more consistent in recreational athletes and older adults than in highly trained elite athletes, where performance ceilings limit measurable gain.
Information on this platform relates to nutritional composition and public disclosure practices only. It is not medical advice. No claims are made about the therapeutic efficacy, safety, or suitability of any product. Always consult a qualified healthcare professional before taking any supplement.