Paul Stamets on health: what the evidence says · JRE #1385
SUBJECT: HEALTH
The short answer
Stamets claims stacking niacin with microdosed psilocybin mushrooms acts as a built-in 'antabuse' deterrent against taking higher, intoxicating doses. Stamets is describing his self-created 'Stamets stack' (psilocybin, niacin, and lion's mane mushroom), a microdosing protocol he has promoted publicly but which has not been tested in any published clinical trial.
Not a true/false call. Every claim is logged with its sources; read the exhibits below.
you add 100 to 200 milligrams of niacin. Now, if someone tries to get high by taking 10 times as much, they'll have like two grams of niacin. This is flushing niacin, vitamin B3. And that flushing niacin will give you such an irritable reaction of skin itching
What the evidence says 01 / RECORD
Stamets is describing his self-created 'Stamets stack' (psilocybin, niacin, and lion's mane mushroom), a microdosing protocol he has promoted publicly but which has not been tested in any published clinical trial. The niacin flush reaction he describes is real and well documented: niacin doses in the gram range (well above the 100-200 mg microdosing amounts he cites) commonly cause a prostaglandin-mediated flushing, itching, and burning-skin reaction, and this effect is dose-dependent, per the NIH Office of Dietary Supplements. However, no peer-reviewed research has examined whether adding niacin to psilocybin functions as a deliberate abuse deterrent, and no clinical or pharmacological literature supports the specific mechanism or intent Stamets describes. The claim mixes an accurate, independently documented pharmacological fact (niacin flush is real and dose-related) with an unstudied, self-promoted behavioral hypothesis (that this flush reliably deters someone from taking a larger psilocybin dose). Current status: the flush mechanism itself is well-supported, but the abuse-deterrent framing and the broader 'Stamets stack' protocol remain unverified and unsupported by clinical evidence.
Evidence sources 03 / EXHIBITS
Who Benefits
Stamets is the founder, owner, and Chief Science Officer of Fungi Perfecti/Host Defense Mushrooms and has publicly promoted the 'Stamets stack' microdosing protocol (psilocybin, niacin, lion's mane) that he personally originated and popularized, giving him a direct reputational and commercial stake in the protocol's credibility.