Do mushroom supplements work? Not in a way that is proven yet: the research is promising, but much of it is lab work, with relatively few clinical trials in people. Makers promote mushrooms for immune support, brain health and energy, and lion’s mane, reishi, cordyceps, chaga and turkey tail have each been studied for specific purposes. The Mayo Clinic Press article from November 12, 2026 reports immune effects from compounds in some mushrooms, along with antioxidant, anti-inflammatory and antiviral properties seen in lab studies and small studies in people. It also explains what shapes those results: the mushroom species, the part used, the extraction method and whether it is cooked or raw.
What kind of research exists on mushroom supplements?
| Fact | What Mayo Clinic Press says (dated 2026-11-12) |
|---|---|
| Type of research | Much of the research is lab work on specific mushrooms or compounds, with relatively few clinical trials in people. |
| What changes results | Which mushroom, which part is used, the extraction type, and whether it is cooked or raw. |
| Forms sold | Coffee, powders, gummies and capsules. |
| Expert quoted | Dr. Heather E. Fields, integrative medicine physician at Mayo Clinic in Phoenix and Scottsdale, Arizona. |
What does the research show so far?
Mayo says compounds from some mushrooms have shown immune effects. Antioxidant, anti-inflammatory and antiviral properties have also appeared in lab studies and small studies in people. Researchers are also studying mood, anxiety, depression, sleep and fatigue. Dr. Fields describes possible immune benefits alongside safety concerns, some of them theoretical. For more on the immune research, see our immunity and body defenses page.
Mayo names several marketing claims: immune support, lower blood pressure, brain health, more energy, weight management and slowing some effects of aging. Dr. Fields calls these marketing claims.
Why lab results can differ from results in people
Mayo says compounds have shown antioxidant, anti-inflammatory, antimicrobial and neuroprotective properties in studies, and that lab results can differ in people. Its example is a compound that kills cancer cells in a dish, which is a lab finding about the dish rather than about a person taking an extract.
Are the benefits proven?
Evidence grade: Preliminary. The research is promising, but benefits are not proven. Much of the research is lab work, with relatively few clinical trials in people.
Which mushrooms are studied, and for what?
Five mushrooms are common in supplements: lion’s mane, reishi, cordyceps, chaga and turkey tail. Each has been studied for a different purpose.
| Mushroom | What Mayo says it has been studied for |
|---|---|
| Lion’s mane | Nerve health and cognition. Mayo cites small human studies that reported gains on some cognition measures. |
| Reishi | Mayo lists it as studied for use alongside cancer care, including some chemotherapy side effects. |
| Cordyceps | Promoted for energy and athletic performance. Research has looked at chronic bronchitis, asthma and chronic heart failure. |
| Chaga | Mayo lists liver and immune-system effects among the areas studied. |
| Turkey tail | A compound called PSK (polysaccharide K) has been examined as an add-on in gastric, esophageal, breast, colorectal and lung cancers. |
Is lion’s mane or chaga the better choice?
Neither has proven benefits, so compare the research behind each one. For lion’s mane, the small human studies are the part to read. Our Lion’s Mane memory studies (our research library) page covers the trials on memory and cognition. If reishi is on your list, our reishi human studies (our research library) page covers that research. Mayo lists cognition for lion’s mane and use alongside cancer care for reishi as areas of study only.
Are mushroom supplements safe?
Mayo warns that “natural” is not the same as risk-free. How safe a supplement is depends on the species, how it was prepared, how much is taken, the product’s quality and the person taking it.
| Concern | What Mayo says |
|---|---|
| Common side effects | Depending on the mushroom: dry mouth, nausea or diarrhea. Taking supplements with food may reduce some side effects. |
| Allergic reactions | Possible with supplements. |
| Nutrient absorption | Some supplements may change how the body absorbs some nutrients. |
| Heavy metals | A concern with wild mushrooms from polluted environments. |
| Medicine interactions | Supplements may interact with prescription and nonprescription medicines, and with treatments. |
Chaga has been studied for possible effects on the liver and immune system. Our mushroom supplement liver safety page covers liver reports and risk factors in more detail.
Mayo also notes that FDA oversight of dietary supplements differs from its oversight of prescription drugs.
Who should talk to a clinician first?
If you fall into one of these groups, ask a doctor, a pharmacist or your cancer care team before you use a mushroom supplement.
- People with autoimmune conditions, because some supplements may affect the immune system. Dr. Fields also raises concern about cancers of the blood and lymphatic system. See our mushroom supplements and autoimmune conditions page.
- People taking immune-affecting medicines during cancer treatment, because of possible interactions.
- Pregnant or breastfeeding people.
- Anyone taking prescription or nonprescription medicines.
What does the Mayo Clinic say about mushroom coffee?
Mayo lists coffee among the forms mushroom supplements come in, alongside powders, gummies and capsules. Its article also links to an earlier Mayo Clinic Press piece on mushroom coffee. For any mushroom product, Dr. Fields’s advice is to look for third-party testing, covered below.
Are mushroom pills worth it, or is eating mushrooms the better option?
For general nutrition, food is the simpler route. Mayo says that for most people, adding edible mushrooms to meals is a healthy way to get nutrition. It says edible mushrooms supply protein, fiber, potassium, zinc and B vitamins, and a few carry vitamin D. How much of each depends on the type, how mature the mushroom is and where it was grown.
Dr. Fields describes mushrooms as rich in vitamins, minerals and prebiotic carbohydrates, which she thinks are probably good for the gut microbiome and overall health. She suggests that eating a wide variety of mushrooms within a whole-foods, plant-based diet is probably the most sensible way to include them. For nutrition details on one common type, see our white button mushroom page.
What does Dr. Fields say about timing and switching?
Dr. Fields points to studies that appear to show peak benefits after 4 to 6 weeks, which is why she rotates supplement types. Her example: moving from lion’s mane to reishi or another option, or stepping off supplements for 4 to 6 weeks. This is her practice advice, drawn from her reading of studies.
How do you check a mushroom supplement label?
On a label, look for these points.
- Choose products with third-party testing. Mayo names U.S. Pharmacopeia (USP), ConsumerLab.com, NSF and NSF Certified for Sport as examples. Dr. Fields says she uses ConsumerLab.com to look into products for herself and her patients.
- Know what that testing covers: it checks that the contents match the label and screens for certain contaminants.
- Check the ingredient list for the exact mushroom you expect to find.
- Mayo advises extra caution with any product that says it can treat or prevent a disease, turn back the clock on aging, or bring dramatic changes in energy or thinking.
- Watch for “magic mushroom” labels. Mayo points out the term can mean psilocybin mushrooms, and some companies use it as marketing language. This page covers functional mushrooms only; the NIDA page on psilocybin covers that subject.
Before you decide
- Which mushroom is on the label, and does the research on that mushroom match what you want?
- Does the product have third-party testing, and what does that testing cover?
- Do you take prescription or nonprescription medicines, or fall into one of the groups above? Ask a pharmacist or doctor first.
By MushroomHealthBenefits.com Research & 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.