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Mushrooms & fungal extracts

Cordyceps

Cordyceps militaris, Ophiocordyceps sinensis and Cs-4 preparations

Cordyceps is a label family, not one standardized ingredient. Small human studies of named Cs-4 and Cordyceps militaris-containing preparations report selected exercise measures, but results do not establish a general focus, energy or recovery benefit. Compare the named species or preparation, form and labelled serving; do not treat powders, mycelium, fruiting-body products and extracts as interchangeable.

Clinical ResearchLimited Human EvidenceForm Dependent EvidencePopulation Specific EvidenceGi Side EffectsMedication Interaction RiskAnticoagulant Caution
Updated August 2026/5 min read/9 citations
Reviewed by the NootropicsIndex editorial team.Method: prioritize cited human research and official safety or regulatory sources; compare retailer-listed prices without endorsing products.Affiliate disclosure
01

What is it?

Cordyceps is a label family

1

Commercial Cordyceps labels can refer to Cordyceps militaris, Ophiocordyceps sinensis or Cordyceps sinensis-style material, Cs-4, mycelium, powders, fruiting-body material and extracts. These preparations are not automatically interchangeable.

Human exercise evidence is limited and product-specific6
The available human studies assess named preparations and selected exercise measures. A recent review describes heterogeneous formulations, small samples and inconsistent findings, so results should not be transferred to every Cordyceps product.
02

Names, aliases and forms

Common NameCordyceps
Scientific NamesCordyceps militaris; Ophiocordyceps sinensis
Taxonomic SynonymCordyceps sinensis
Extract NameCs-4
Active ConstituentsCordycepin; Polysaccharides
03

Mechanisms of action

Marker claims are not outcome proof

6

Cordycepin, polysaccharides and extract ratios can describe a product label or assay, but they do not prove that different species, mycelium, powder, fruiting-body or extract products have the same human effect.

04

Potential effects and evidence map

Small human studies of named Cs-4 and Cordyceps militaris-containing preparations report selected exercise physiology outcomes. A 2026 review found heterogeneous formulations, small samples and inconsistent findings. This evidence does not establish general cognitive, mood, stimulant-like energy or recovery benefits, and it should not be transferred between species or preparations.

Effect domainMagnitudeGrade
Physical energy / endurance4
CumulativeConfidence: Low

Small studies of named Cordyceps preparations report selected exercise physiology outcomes, but formulations and results differ and do not establish a general endurance benefit.

Note The 2017 study used a multi-mushroom blend containing Cordyceps militaris; it is not evidence for every Cordyceps product.

1/5
C
Focus / attention6
UnknownConfidence: Medium

Human evidence is insufficient for general focus or attention claims from Cordyceps products.

Note Exercise studies and a small post-exercise cognition experiment do not establish an everyday focus benefit.

0/5
E
05

Typical dosages and timing

Healthy older-adult trial31 g/day for 12 weeks

One small trial used Cs-4, a named Cordyceps sinensis preparation, at 333 mg three times daily in healthy adults aged 50-75 years. This is study context, not a routine dose for other Cordyceps products.

Young-adult exercise study44 g/day for 1-3 weeks

A 2017 exercise study used a multi-mushroom blend containing Cordyceps militaris. The study protocol is not a consumer dose recommendation and should not be applied to standalone powders or extracts.

06

Timing & effect horizon

Effect horizonUnknown
Unknown
No general onset, duration or cycle is established6

The cited study courses are product-specific research windows. They do not establish a reliable same-day subjective-energy onset, effect duration or general supplement cycle.

07

Safety, side effects and risk profile

Tolerability and product differences7
Current LiverTox describes mild gastrointestinal effects as uncommon in clinical studies and no published acute liver-injury signal. That does not establish identical safety for every commercial mixture or extract.
GI discomfort7
Confidence: Medium

Current LiverTox describes mild gastrointestinal effects as uncommon in clinical studies of Cordyceps products.

Note Individual product composition and tolerability can still differ.

1/5
C
Interaction risk9
Confidence: Medium

Memorial Sloan Kettering describes laboratory glucose-lowering and antiplatelet signals. Clinical relevance for glucose-lowering medicines is uncertain; a bleeding case report is also described with cordyceps use.

Note This is targeted medication context, not a broad interaction list for every Cordyceps product.

2/5
D
08

Interactions and cautions

Blood glucose and bleeding medicines9

Memorial Sloan Kettering describes potential glucose-lowering and antiplatelet effects. The glucose interaction has uncertain clinical relevance; the source also reports a bleeding case associated with Cordyceps use. This does not create a general interaction list for every Cordyceps product.

09

Legal and regulatory status

United States8

As checked on 2026-08-02, FDA does not approve dietary supplements before they are marketed. This is United States regulatory context and does not establish Cordyceps safety, effectiveness or status in other jurisdictions.

10

Practical buying and quality notes

  • Compare the named species or preparation before price: C. militaris, Ophiocordyceps sinensis or sinensis-style material, Cs-4, mycelium, powder, fruiting-body material and extract labels are different product contexts.2
  • The catalog currently has 25 active Cordyceps listings. Compare the labelled serving, named material and any batch-specific assay or COA disclosure before comparing offers as like-for-like.
11

FAQ

Is Cordyceps militaris the same as Cordyceps sinensis?

2

No. Cordyceps militaris, Ophiocordyceps sinensis or Cordyceps sinensis-style material, and Cs-4 identify different species or preparations. A result from one should not be assumed to apply to another.

Does Cordyceps improve focus?

6

Human evidence is insufficient for a general focus or attention claim. The small exercise-focused studies do not establish an everyday cognitive benefit.

What do studies say about duration or cycling?

3

The cited studies used named preparations for one to three weeks or twelve weeks. Those are research windows, not a general Cordyceps cycle or effect-duration recommendation.

12

References

  1. NCBI Taxonomy. Cordyceps militaris.
  2. NCBI Taxonomy. Ophiocordyceps sinensis.
  3. Chen S, Li Z, Krochmal R, et al. Cs-4 (Cordyceps sinensis) and exercise performance in healthy older subjects. J Altern Complement Med. 2010.
  4. Hirsch KR, Smith-Ryan AE, Roelofs EJ, Trexler ET, Mock MG. Cordyceps militaris and high-intensity exercise tolerance. J Diet Suppl. 2017.
  5. Dewi L, Liao YC, Jean WH, et al. Cordyceps sinensis and skeletal muscle after exercise. Food Funct. 2024.
  6. Jedrejko M, Jedrejko K, Granda D, et al. Cordyceps militaris ergogenic and post-exercise recovery effects in humans. Nutrients. 2026.
  7. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. Cordyceps. National Institute of Diabetes and Digestive and Kidney Diseases. Updated 2025.
  8. U.S. Food and Drug Administration. Information for Consumers on Using Dietary Supplements.
  9. Memorial Sloan Kettering Cancer Center. Cordyceps. About Herbs database.
Note

This page is informational and summarizes available evidence. It is not medical advice, a recommendation, or a substitute for guidance from a qualified clinician.