A health practitioner recently emailed me a screenshot of an Instagram post advertising mushroom coffee and asked: “Many of my patients are using this product. Does it really reduce cortisol?” Thanks for this great question!
Fungi-laced coffees are positively mushrooming in the wellness world right now, popping up on social media feeds faster than you can say “adaptogen latte.” Products like Four Sigmatic, Ryse, MUD\WTR, Everyday Dose, Teeccino and Chagaccino promise calmer nerves, sharper focus, and stress-proof mornings, all in one frothy cup.
While mushroom coffees may have some modest, emerging benefits, the hype is far ahead of the human data, and most of their feel-good effect is likely from the caffeine in the coffee (some contain up to 90 mg per cup, the same as a cup of good old-fashioned java), rather than the fungal addition.
Most blends consist of regular instant coffee plus a powdered mix of medicinal mushrooms such as lion’s mane, reishi, cordyceps, turkey tail, shiitake, and king trumpet, sometimes with added MCT oil.
One key challenge in assessing their quality and potential health benefits is that companies usually do not disclose precise doses or standardization of active compounds, which matters a lot when we try to translate research into real-world products. There is no single standard, but most commercial mushroom coffees are roughly 10–50% mushroom extract by weight. Moreover, we don’t know how different processing methods – drying, extracting and brewing – affect the mushrooms’ health benefits.
Do the mushrooms have evidence-based benefits?
There is some early human research on individual mushrooms or proprietary blends:
- Lion’s mane: A recent randomized, placebo-controlled trial (1.8 g/day for 28 days) in healthy adults found slightly faster cognitive task performance and a trend toward reduced subjective stress, but the study was small and considered preliminary.
- Mushroom blends and stress: A 2026 study of a multi-mushroom “Restake” supplement (note that like many small nutrition studies, this one was funded by Nexus Wise, the company that makes this mushroom blend) reported reduced anxiety scores and about a 4–6% drop in serum cortisol over 6–12 weeks compared with minimal change on placebo, again in a controlled setting with defined dosing.
- Cordyceps: Small trials suggest possible improvements in exercise tolerance and aerobic capacity with cordyceps-containing blends, but effects are modest and data are limited.
While these findings are interesting, they don’t prove that a low-dose, undisclosed blend in a coffee sachet will reproduce the same effects.
Do mushroom coffees lower cortisol?
Some mushroom blends (not coffee-specific) have been shown to cause small reductions in cortisol and stress/anxiety scores in controlled trials, suggesting possible adaptogenic effects. However:
- The absolute cortisol changes are modest (single-digit percentage drops), and long-term clinical significance is unclear.
- We don’t know if mushroom coffees contain comparable doses or bioactive compounds.
- Marketing often overshoots the data, implying big, generalized benefits for “stress” and “burnout” that the science does not yet justify.
So: not pure fad—there is some promising data—but over-marketed relative to the evidence.
What about caffeine and stress?
Most mushroom coffees still contain caffeine, though often less than a standard cup; that alone can make people feel more alert, focused, and energetic. Caffeine blocks adenosine receptors in the brain, which reduces sleepiness and can transiently improve concentration and mood.
At the same time, caffeine can increase cortisol and adrenaline, especially in people who are sensitive, stressed, or consume higher doses. Studies show that caffeine elevates cortisol both at rest and during mental or physical stress, and that habitual higher caffeine users can experience greater cortisol reactivity to stressors.
So yes: the very ingredient that makes you feel energized can, in some people and contexts, amplify the physiological stress response.
Who should be cautious or avoid mushroom coffee?
There’s nothing wrong with drinking mushroom coffee if you enjoy it and experience benefits from it. People who may want to avoid or limit mushroom coffees include:
- The extracts used in mushroom coffee can sometimes be hard on digestion.
- People who are prone to digestive troubles might be more vulnerable to these effects.
- In addition, certain types of mushrooms often used in mushroom coffee (notably, the chaga variety) contain high levels of compounds called oxalates. A diet that contains too many oxalates puts you at risk for developing kidney stones.
- Those sensitive to caffeine, with anxiety, insomnia, heart palpitations, or uncontrolled hypertension, since caffeine can worsen symptoms and raise stress hormones.
- Anyone on immunosuppressive therapy, chemotherapy, or multiple medications, because some medicinal mushrooms may interact with immune function or drug metabolism (data are limited, so prudence is wise).
- People with mushroom allergies or a history of strong reactions to fungi.
- Pregnant or breastfeeding individuals, since safety data for concentrated mushroom extracts are sparse.
Finally, for any cost-conscious shopper, the price of mushroom coffee will certainly be a factor. Popular mushroom coffees run about $1.20–$1.50 per serving, compared with 25–30 cents per serving for a mid‑priced supermarket or moderate specialty coffee.
If you enjoy the taste and ritual, a mushroom coffee can be a fine alternative to regular coffee, especially if the caffeine content is lower and it helps you cut back overall. Just don’t rely on it as your primary “stress treatment”: evidence-based approaches—sleep, movement, social support, therapy, nervous system regulation practices, and broader nutrition patterns—still carry far more weight than any powder in your mug.
As for me, I’ll stick with my good-old 100% Arabica coffee and continue enjoying mushrooms in my omelets, grains bowls, risottos, pasta meals, soups, stews, congees, and more.