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Cordyceps (CS-4 / Militaris)

Endurance · oxygen utilization · vitality

Moderate evidenceVegan57 studies on PubMedRead the research
Written to our editorial standards · reviewed against published research· Updated 30 May 2026
Last reviewed: May 30, 2026

Cordyceps: Endurance · oxygen utilization · vitality. Functional mushroom traditionally used to support stamina, lung function, and aerobic capacity at altitude. Standard dose 1000 mg, taken in the morning, about $22/month. Evidence rating: moderate evidence.

Where to buy

Host Defense Cordyceps
Recommended
Host Defense, Cordyceps
1000 mg · Morning · ~$22/month

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All product options

Host Defense CordycepsBestseller
Cordyceps
Host Defense
60 veg capsules · $26 · ★ 4.6
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Real Mushrooms Cordyceps-MBestseller
Cordyceps-M
Real Mushrooms
120 capsules · $30 · ★ 4.7
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NOW Foods CordycepsPremium
Cordyceps
NOW Foods
90 veg caps · $18 · ★ 4.6
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Nutricost CordycepsPremium
Cordyceps
Nutricost
180 capsules · $20 · ★ 4.5
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What is Cordyceps?

Cordyceps is a genus of parasitic fungi traditionally harvested from the Tibetan plateau, where it has been used for centuries to support stamina, sexual vitality, and respiratory function. Modern supplements use cultivated forms, primarily CS-4 (a Cordyceps sinensis strain) and Cordyceps militaris, which produce the same active compounds (cordycepin and adenosine derivatives) sustainably and at scale. Research suggests cordyceps may improve oxygen utilization (VO2 max), exercise tolerance, and energy production in skeletal muscle by enhancing ATP synthesis. Typical doses range from 1,000-3,000 mg per day. It pairs well with cordyceps-containing pre-workouts or coffee blends.

Functional mushroom traditionally used to support stamina, lung function, and aerobic capacity at altitude.

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Common questions

What is Cordyceps?
Cordyceps is a genus of parasitic fungi traditionally harvested from the Tibetan plateau, where it has been used for centuries to support stamina, sexual vitality, and respiratory function. Modern supplements use cultivated forms, primarily CS-4 (a Cordyceps sinensis strain) and Cordyceps militaris, which produce the same active compounds (cordycepin and adenosine derivatives) sustainably and at scale. Research suggests cordyceps may improve oxygen utilization (VO2 max), exercise tolerance, and energy production in skeletal muscle by enhancing ATP synthesis. Typical doses range from 1,000-3,000 mg per day. It pairs well with cordyceps-containing pre-workouts or coffee blends.
What is Cordyceps used for?
Endurance · oxygen utilization · vitality. Functional mushroom traditionally used to support stamina, lung function, and aerobic capacity at altitude.
What is the standard dose of Cordyceps?
1000 mg, typically taken in the morning. Approximate cost is $22 per month.
How strong is the evidence for Cordyceps?
Moderate evidence for its primary uses. See the full study list on the research page.

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