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Mushroom coffee is regular coffee, usually instant or ground, blended with powdered extracts of mushrooms such as lion’s mane, chaga, reishi or cordyceps. It tastes much like coffee, and many blends contain less coffee per serving, so they can have less caffeine than a regular cup. Brands promote focus, calm energy and immune support, but almost all the evidence comes from lab and animal studies or small human trials of the mushrooms themselves, not of mushroom coffee. Some of these mushrooms also carry real cautions: chaga is very high in oxalate, and reishi has been linked to liver injury in case reports. Here is what is in the cup and what the science supports.
Peptide Labs sells caffeine-containing supplements but does not sell mushroom coffee or any mushroom supplement. This article is general information, not medical advice.
Key Takeaways
- Mushroom coffee is coffee mixed with mushroom extracts; caffeine varies by recipe and is often lower.
- Lion's mane, chaga, reishi and cordyceps are the most common mushrooms in these blends.
- Human evidence is limited to small trials of individual mushrooms, not of mushroom coffee itself.
- Chaga is very high in oxalate and has been linked to kidney damage in case reports with heavy use.
- Reishi, chaga and cordyceps may add to bleeding risk with blood thinners; ask your pharmacist.
What is mushroom coffee?
These are not culinary mushrooms like button or portobello. They are so-called functional mushrooms from traditional Asian and northern European folk medicine, dried and extracted into powder. The coffee part is normal coffee, and some products also add cocoa, cinnamon or adaptogenic herbs such as ashwagandha. Caffeine is the main active ingredient you will notice. One large brand advertises less than half the caffeine of regular coffee, but that is a recipe choice, not a property of mushrooms. Many labels do not state caffeine at all, so the only way to know is to check the package or ask the maker.
| Mushroom | Scientific name | What marketing says | What the evidence shows |
|---|---|---|---|
| Lion's mane | Hericium erinaceus | Focus, memory | A few small human trials with mixed results |
| Chaga | Inonotus obliquus | Antioxidants, immunity | Lab and animal studies only; very high in oxalate |
| Reishi | Ganoderma lucidum | Calm, immunity | Mostly lab studies; liver injury case reports |
| Cordyceps | Ophiocordyceps sinensis | Energy, stamina | Mostly lab studies; may lower blood sugar |
Mushroom coffee benefits: what the research shows
We found no well-designed trials testing mushroom coffee products themselves. Claimed mushroom coffee benefits are borrowed from research on individual mushrooms, usually at amounts and in forms that a single cup may not match. Here is what exists for each.
Lion's mane coffee and focus
Lion’s mane coffee is a common variety, sold for focus and memory. An often-cited human trial, published in 2009, randomized 30 Japanese adults aged 50 to 80 with mild memory problems to lion’s mane tablets or placebo for 16 weeks. Scores on a cognitive scale rose in the lion’s mane group, then fell again within four weeks of stopping. A 2023 UK pilot trial in 41 healthy young adults found faster performance on one attention task an hour after a single serving and a borderline drop in self-reported stress after 28 days, along with several null results; the authors urged caution because of the small sample. A 2025 systematic review lists stomach discomfort, headache and allergic reactions as possible side effects.
Chaga, reishi and cordyceps
MSKCC describes antioxidant, immune and blood sugar effects for chaga mostly from preclinical studies, meaning cells and animals. Reishi and cordyceps have long histories in traditional Chinese medicine, but human trials are small and varied. None of these mushrooms is approved to prevent or manage any illness, and dietary supplements and foods cannot legally claim to do so.
The coffee and caffeine effect
Much of what people notice from mushroom coffee is probably the coffee. Lower-caffeine blends may feel smoother simply because they contain less caffeine. If that is your goal, half-caffeinated coffee does the same thing. For context on limits and sensitivity, see how much caffeine is too much; for other caffeine sources, see our guides to caffeine pills, yerba mate and the caffeine metabolite paraxanthine. Some drinkers pair caffeine with L-theanine, an amino acid from tea with its own small body of research.
Is mushroom coffee healthy? Safety cautions
For most healthy adults, an occasional cup of mushroom coffee is unlikely to cause problems beyond the usual caffeine effects. Whether mushroom coffee is healthy for you depends on which mushrooms it contains, how often you drink it and what medicines you take. The cautions below come from MSKCC and published case reports.
- Chaga and kidneys: a 2014 Japanese case report described a 72-year-old woman who developed oxalate kidney damage and needed dialysis after drinking chaga powder daily for six months; the authors noted chaga contains extremely high oxalate. Korean reports from 2020 and 2022 describe two more men with oxalate kidney injury after long-term or heavy chaga use. People with kidney disease or a history of kidney stones should ask a clinician before using chaga products.
- Reishi and the liver: MSKCC lists liver injury among reishi side effects, and case reports from Hong Kong and Thailand linked powdered reishi to severe hepatitis, one of them fatal. Stop and get medical care for yellowing skin or eyes, dark urine or upper belly pain.
- Bleeding: MSKCC says chaga, reishi and cordyceps may increase bleeding risk, especially with blood thinners such as warfarin. Mention them before surgery or dental work.
- Blood sugar: cordyceps and chaga showed glucose-lowering effects in lab studies; if you use insulin or other diabetes medicines, ask your prescriber.
- Immune and other medicines: MSKCC advises people on immunosuppressants to check before using reishi, and lab studies suggest reishi may affect liver enzymes that process drugs.
- Pregnancy, breastfeeding and children: safety data are lacking; caffeine limits also apply.
- Allergies: anyone allergic to mushrooms or molds should avoid these blends.
How to read a mushroom coffee label
- Caffeine: look for a stated amount per serving; if none is listed, ask the maker.
- Mushroom amounts: proprietary blends often list a total weight for all mushrooms, so you cannot tell how much of each is present.
- Fruiting body or mycelium: labels may name the part used; mycelium grown on grain can include some of the grain.
- Testing: a seal from an independent tester is a sign of quality control; see our third-party testing guide.
- Other ingredients: check for added sugar, creamers or herbs such as ashwagandha that carry their own cautions.
Comparing plant-based trend products? Our maca root guide covers another powder often stirred into coffee and smoothies.
Frequently Asked Questions
What is mushroom coffee?
It is regular coffee mixed with powdered extracts of mushrooms such as lion’s mane, chaga, reishi or cordyceps. It tastes much like ordinary coffee.
Does mushroom coffee have caffeine?
Yes, because it contains coffee. Many blends use less coffee per serving than a regular cup, but the amount varies, so check the label.
What are the benefits of mushroom coffee?
Claimed benefits come from small studies of individual mushrooms, not of mushroom coffee itself. A few small lion’s mane trials reported mixed effects on attention and memory scores.
Is mushroom coffee healthy?
An occasional cup is unlikely to harm most healthy adults, but chaga is very high in oxalate and reishi has been linked to liver injury in case reports.
Is lion’s mane coffee good for focus?
Evidence is thin. Small trials of lion’s mane supplements had mixed results, and no good trials have tested lion’s mane coffee.
Who should avoid mushroom coffee?
People who take blood thinners, diabetes medicines or immunosuppressants, people with kidney or liver disease, and anyone pregnant should check with a clinician first.
Questions about a label? Contact us or read our Buyer’s Guide. Follow the label and ask a healthcare provider before starting any supplement, especially if you take medicines. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Last reviewed October 2026.
Related guides: How Much Caffeine Is Too Much? Daily Limits, Overdose Signs and Label Math, Caffeine Pills: Caffeine Anhydrous, Tablets vs Coffee and Safety, L-Theanine Benefits, Side Effects and the Caffeine Combination.