Mushrooms and Mental Health: Depression, Anxiety and Mood Research Across Species

Research on mushrooms and mental health falls into two very different piles: human clinical trials on psilocybin-containing mushrooms for depression and anxiety, and much smaller, more preliminary human studies on non-psychoactive species like reishi, lion’s mane, and cordyceps for stress and mood. The two should never be confused. Psilocybin research is conducted under medical supervision with a controlled, measured dose of a psychoactive compound. Research on reishi, lion’s mane, and similar species involves dietary supplements sold over the counter, and the human evidence behind mood claims for those species is thin.

If You’re in Crisis, Read This First

No mushroom, supplement, or natural remedy is a substitute for emergency mental health care. If you are having thoughts of suicide or self-harm, or you are worried about someone else’s safety, call or text 988 (the Suicide and Crisis Lifeline) in the United States, or go to the nearest emergency room. This applies whether or not you have taken any mushroom product.

Psilocybin Mushrooms: The Human Clinical Evidence

Psilocybin is the psychoactive compound in “magic mushrooms.” According to the National Center for Complementary and Integrative Health (NCCIH), the strongest human research on mushrooms and mental health involves psilocybin combined with psychotherapy, studied for depression, anxiety, and existential distress.

Depression: One study found that a single dose of psilocybin, given alongside psychotherapy, rapidly reduced depression symptoms within 8 days, with benefits reported out to 6 weeks. A separate 2023 analysis found benefits lasting up to about 5 weeks. Longer-term effects beyond that window are not well established.
Comparison to standard antidepressants: A 2021 clinical trial found that psilocybin performed no better than escitalopram (a standard SSRI antidepressant) when both were paired with therapy. This is an important limit: psilocybin has not been shown to clearly outperform existing treatment in head-to-head testing.
Anxiety and existential distress in serious illness: A smaller body of research has looked at psilocybin-assisted psychotherapy in people with advanced cancer. A 2020 analysis concluded this approach may be safe and effective for improving anxiety, depression, and existential distress in that specific population — a different context than everyday anxiety or depression.

Every study cited above paired psilocybin with structured psychotherapy and clinical supervision. None of this research supports unsupervised use of psilocybin mushrooms for depression or anxiety.

Psilocybin Safety Limits, Per NCCIH

NCCIH lists specific risks that apply regardless of study results:

Unpredictable psychological reactions, sometimes called “bad trips,” involving extreme fear, confusion, or panic
Physical effects including increased blood pressure, increased heart rate, nausea, and headaches
Mental health risks including anxiety, paranoia, and, in rare cases, persistent psychosis
Psilocybin is not considered safe for people with psychotic conditions such as schizophrenia
Street or unregulated psilocybin products carry a risk of dangerous adulteration, including with fentanyl
Misidentifying wild mushrooms carries a risk of lethal poisoning that has nothing to do with psilocybin content

Psilocybin also remains a Schedule I controlled substance under U.S. federal law, with narrow legal exceptions in specific states and clinical trial settings. Legal status varies by location and changes over time, so verify current law where you live before assuming any use is permitted.

Non-Psychoactive Species: Reishi, Lion’s Mane, Cordyceps, and Mood

Separate from psilocybin, a different category of mushrooms — reishi, lion’s mane, cordyceps, shiitake, and maitake — is marketed for stress relief and mood support as everyday supplements. The human evidence here is real but much more limited than marketing often suggests.

A small trial in female college students found stress-related improvements with reishi, but this result has not been independently replicated.
A trial testing a blend of five mushrooms (reishi, lion’s mane, cordyceps, shiitake, and maitake) measured cortisol and anxiety levels and found larger reductions than placebo. However, the study was small, conducted at a single site, and funded by the company that manufactures the tested product — all factors that call for caution before generalizing the result.
A trial combining reishi with ashwagandha measured perceived stress in healthy adults.
For lion’s mane specifically, a 2025 systematic review identified five randomized controlled trials and three pilot studies in humans testing cognitive or mood outcomes. One pilot study looked at cognitive function, stress, and mood in young adults but did not establish broad clinical effectiveness.

Laboratory and animal research has linked reishi compounds to anti-inflammatory and antioxidant activity, and lion’s mane compounds called hericenones and erinacines to nerve growth factor stimulation in preclinical models. These mechanistic findings explain why researchers are interested in these species, but findings in cells or animals frequently fail to hold up once tested in randomized human trials. Lab and animal work can generate ideas worth testing in people. It cannot show what a mushroom will actually do for a person’s mood or stress levels.

Human Evidence vs. Everything Else: Why the Distinction Matters

Most mushroom-and-mood headlines blend three very different evidence types into one confident-sounding claim. Keeping them separate is the single most useful skill for evaluating this research:

Human clinical evidence: Randomized controlled trials or systematic reviews of trials in people. This is the only evidence type that can show whether a mushroom or compound actually changes depression or anxiety symptoms in humans, and even here, small sample sizes, single-site designs, and industry funding limit how much any one study proves.
Animal and in-vitro evidence: Studies in mice, rats, or isolated cells. Useful for understanding possible mechanisms, but findings routinely fail to translate into effects seen in people.
Traditional or historical use: Reishi and other species have long histories of traditional use for calm and vitality. Long-standing traditional use is not the same as clinical proof of effectiveness and does not establish a safe or effective dose.

Quick Evidence Checklist

Is the claim based on a human trial, an animal study, or a cell study? Traditional-use claims should be labeled as such, not presented as clinical evidence.
How many people were in the human study, and was it replicated by an independent research group?
Was the study funded by a company that sells the product being tested?
Does the claim involve psilocybin (a regulated, psychoactive compound requiring medical supervision) or a non-psychoactive species like reishi or lion’s mane (an over-the-counter supplement)?
Does the source mention any medication interactions, contraindications, or extra-caution groups — or does it only list benefits?

Who Should Use Extra Caution

Anyone with a personal or family history of psychosis, schizophrenia, or bipolar disorder should not use psilocybin, per NCCIH.
Anyone currently taking antidepressants, mood stabilizers, or other psychiatric medication should talk with a prescribing clinician before combining any mushroom product with their treatment plan, since interactions are possible and not fully mapped in the research above.
Pregnant or breastfeeding individuals were not represented in the human trials described here, so evidence on safety in pregnancy and breastfeeding is not established for these uses.
Anyone currently in a mental health crisis should seek emergency or crisis support rather than relying on a mushroom product of any kind.

Evidence Limits

The clinical trials described above are, by research standards, still early-stage. Sample sizes are small. Several studies have not been independently replicated. At least one relevant trial was funded by the company selling the tested product, which is a recognized source of bias. Psilocybin research is conducted under controlled clinical conditions that do not resemble unsupervised, over-the-counter use. None of the research summarized here should be read as proof that any mushroom, psychoactive or not, reliably treats depression or anxiety on its own.

FAQ

Can eating culinary mushrooms like shiitake or button mushrooms improve my mood?

There is no strong human clinical evidence that eating ordinary culinary mushrooms changes depression or anxiety symptoms. The mood-related research summarized here involves specific extracts or the psychoactive compound psilocybin, not mushrooms used in everyday cooking.

Is it legal to use psilocybin mushrooms for depression or anxiety?

Psilocybin remains a Schedule I controlled substance under U.S. federal law, with limited exceptions in specific states and approved clinical trials. Legal status varies by location and can change, so check current law in your area rather than assuming any use is permitted.

Do lion’s mane or reishi supplements work as fast as prescription antidepressants?

There is no clinical evidence comparing the speed of lion’s mane or reishi supplements to prescription antidepressants for mood. The human trials on these species are small, preliminary, and focused mainly on stress and cognitive markers, not diagnosed depression.

Should I stop my antidepressant or anti-anxiety medication and try a mushroom supplement instead?

Do not stop or change a prescribed psychiatric medication without talking to the clinician who prescribed it. Stopping antidepressants or anti-anxiety medication abruptly can cause withdrawal effects and a return of symptoms. Any decision about your treatment should be made with a qualified clinician.

Educational Disclaimer

This article is for general educational purposes only. It is not medical advice, and it does not diagnose, treat, or support any condition. Mushroom species and compounds discussed here are not approved by the FDA to treat depression, anxiety, or any other mental health condition. Always talk with a qualified healthcare provider before starting, stopping, or changing any medication or supplement, and seek immediate help from a crisis line or emergency services if you are in crisis.