Cordyceps for Weight Loss: Research, Doses and Safety

No. Cordyceps has not been shown to cause weight loss in people. The weight-related findings that get cited come from animal studies, and Harvard Health says well-designed human trials of medicinal mushrooms are lacking. The human research that does exist is mostly about exercise, and it gives mixed results.

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Does cordyceps help you lose weight?

Harvard Health notes that some mushroom coffee brands claim their products help with weight loss by boosting metabolism and burning fat. It then says there is very little research on medicinal mushrooms that includes humans, that benefits seen in test tubes or animals may not apply to people, and that none of the research was done on mushroom coffee itself.

The weight and metabolism findings you may see quoted are animal findings:

• Myprotein says the idea that cordyceps has anti-obesity effects during menopause rests on one study in rats, and that human research is needed.
• MedicineNet describes animal work in which cordyceps extract improved insulin sensitivity over 25 days, and another in which it lowered fasting blood glucose by 27% over 17 days. It says it is not clear these effects happen in people.

So a cordyceps supplement is not a fat-loss tool on current evidence. Weight change comes mainly from your overall eating pattern, movement, sleep and any medical factors, and a clinician or registered dietitian can look at those with you. If you are weighing other products, our pages on weight loss patches and Citrus Burn show how we read marketing claims.

One practical point from Harvard Health: if you want mushrooms in your diet, a side of shiitakes brings fiber and is low in calories and fat.

What are cordyceps benefits, for men and for women?

Cordyceps is a fungus that grows on insect larvae. It is used in traditional Chinese medicine, and Memorial Sloan Kettering says supplements come as capsules, powders and liquid extracts. The sources describe the same research areas for men and women, and none of them gives a sex-specific benefit that has been confirmed in people.

A randomized trial and a 2025 meta-analysis of exercise outcomes are indexed on PubMed (trial, meta-analysis). They looked at different species, preparations and doses, and their findings vary by product, population and outcome.

Do cordyceps raise testosterone?

Not in any human study described by these sources. Memorial Sloan Kettering says cordyceps stimulated testosterone production in mice and that whether it does the same in humans is not known. The mouse work cited there used cell and animal models, so a testosterone change in a man taking a supplement is unproven.

How long do cordyceps take to work?

There is no reliable timeline. Feel's blog says you may notice effects almost immediately because many compounds are water-soluble, but it names no study on timing. In trials, exercise measures were checked after 5 weeks (no change in cyclists) and after 12 weeks (gains in older adults). For weight there is no human data to build a timeline from, and no supplement outcome or timeline is guaranteed.

What doses have been studied, and what form is best?

The studies in these sources used different species, forms and doses:

Sellers give different guidance. Feel says doses of 1,000 to 4,000 mg per day were well tolerated in clinical studies, VitaminLab says typical doses run upwards of 2,000 mg and suggests starting at 500 mg, and Myprotein says there are no set guidelines and cites a suggestion not to exceed 4 g per day of C. sinensis for more than five months a year. Because these numbers conflict, a clinician is the better source for any dose.

On form, no source shows that one is best. What differs is the species and the part of the fungus:

• Cordyceps sinensis is the traditional wild species. VitaminLab says it cannot be cultivated and is very expensive, so most products use cultured material.
• Cordyceps militaris can be grown as a fruiting body. VitaminLab says its compound profile is similar to C. sinensis.
• Mycelium versus fruiting body: MedicineNet says about 80 to 85% of mushroom supplements come from the fruiting body, but cordyceps supplements often contain only mycelium. VitaminLab notes mycelium grown on grain differs from mycelium grown in liquid culture.
• Format: Myprotein lists gummies, capsules, powders, tinctures and dried whole form. Pick the one you will take as directed, then check the label for species, part and milligrams.

Labels differ in how much they tell you. Pilly Labs lists 200 mg of cordyceps extract per gummy in its Cordyceps Energy Gummies and 50 mg per dropper in its Adaptogen Immunity Drops (Cordyceps militaris), while Feel describes a 4:1 extract and VitaminLab suggests 500 mg. Amounts like these sit below most of the study doses above, and ingredient research does not prove what a finished product will do.

Is cordyceps hard on the liver?

The sources do not point to liver harm. Memorial Sloan Kettering says no major side effects have been reported. Myprotein reports one human study that found no liver, kidney or blood-component problems over eight weeks of C. militaris, though the dose printed on that page (2.85 mg) looks unusually small, so treat it cautiously. MedicineNet describes liver benefits as early and says more research is needed. If you have liver disease or take medicines your liver processes, a clinician or pharmacist can check the details. One mushroom supplement maker's drug-interaction notice says some mushroom compounds may affect liver enzyme activity and change how certain drugs are processed.

What are the dangers and side effects?

• Bleeding: Memorial Sloan Kettering cites a case report of excessive bleeding after a tooth extraction in a person using cordyceps daily as a tonic. MedicineNet says cordyceps may act like a blood thinner and suggests those with a bleeding disorder or upcoming surgery may want to avoid it.
• Low blood sugar: lab studies suggest cordyceps may add to the effect of diabetes medicines and insulin. Clinical relevance has not been determined.
• Bone marrow cancers: in animals, cordyceps increased immature red blood cells. Memorial Sloan Kettering says people with myelogenous-type cancers should not use it.
• Pregnancy, autoimmune conditions, immunosuppressant drugs: Myprotein says people with these should talk to a healthcare professional, and that pregnant and breastfeeding women should avoid cordyceps because safety research is limited.
• Long-term use: Myprotein says long-term human research is limited.

If you have a reaction to any supplement, a healthcare provider can advise you. Adverse events can be reported to the FDA at safetyreporting.hhs.gov or 1-800-FDA-1088.

What not to mix with cordyceps?

Ask a clinician or pharmacist before combining cordyceps with:

• Blood thinners such as warfarin, and antiplatelet drugs. Memorial Sloan Kettering says cordyceps may increase bleeding risk.
• Insulin or other blood-sugar-lowering medicines.
• Immunosuppressant medicines.
• Other supplements that affect bleeding. The Cordyceps Energy Gummies, for example, also contain ginkgo (25 mg). The National Center for Complementary and Integrative Health says ginkgo has no conclusive evidence for a health condition and raises bleeding and drug-interaction concerns.

The same applies to anything that makes you drowsy or changes blood pressure if it is in the same product. Check every ingredient on the label, not only the cordyceps.

Does cordyceps help with cancer?

It is not a cancer treatment. MedicineNet describes antitumor findings from lab dishes and animals and says these are early studies. Memorial Sloan Kettering lists the same kind of findings as preclinical, and says doctors have not studied many of the other uses. If you are in cancer care, tell your oncology team about any supplement, including cordyceps, before you use it.

Lion's mane or cordyceps: which is better, and can you take both?

Neither is shown to be better, because they are studied for different things. Cordyceps research centers on exercise and immune markers. Lion's mane is usually discussed for focus, but a small 2025 acute study of 18 adults using 3 g of a 10:1 fruiting body extract found no significant overall effect on cognition or mood, with one isolated task signal. Neither has weight-loss evidence in people.

None of these sources studies the two together, so there is no research showing they work better as a pair or that the combination is safer. Some products combine them; Pilly Labs' Mushroom Energy and Cognition Drops list 100 mg of each. If you take both, add up the total daily amount and check for overlap with other products.

Why do I feel weird after taking lion's mane?

These sources do not list common lion's mane side effects, so there is no single answer. Possible reasons include individual response, a mushroom or mold sensitivity, caffeine if it was in mushroom coffee, or another ingredient in the product. Stopping or continuing is a decision for you and a clinician, especially if you take medicines or have a medical condition. Note the product, amount and timing so you can describe it.

Does the Last of Us timeline apply to cordyceps supplements?

No. The show is fiction. Myprotein notes that real cordyceps parasitize insects and that people do not need to fear them. A supplement has no “kick in” moment like the one in the show; see the timing section above.

How do you compare cordyceps products?

For weight goals, check sugar and calories too. The Cordyceps Energy Gummies list 2 g of added sugar per gummy. The 10-mushroom Mushroom Gummies list 20 calories and 5 g of added sugar per two-gummy serving, and their 250 mg blend includes cordyceps but does not say how much of each species is inside.

If you are comparing mushroom coffees, Vitality Mushroom Coffee is one example label: it lists a 90% Arabica blend with 5% Lion's Mane and 5% Chaga, and it does not list cordyceps. Confirm the caffeine amount on the bag, since sensitivity varies and the FDA's caffeine guidance explains how much is too much.

Before you buy a cordyceps product

• Is the species named (sinensis or militaris), and is it mycelium or fruiting body?
• Is the cordyceps amount listed alone, or hidden inside a blend total?
• What else is in it (ginkgo, GABA, DMAE, caffeine, sugar)?
• Do you take blood thinners, diabetes medicine or immunosuppressants, or are you pregnant, nursing or facing surgery? Ask a clinician first.
• Does the marketing promise weight loss or a fast result? The research above does not support either.

By NewLifeWellnessCenter.com Editorial Team

This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.