لائنز مین · Hericium erinaceus
Weak evidence
Fashionable, with a couple of tiny human studies and a great deal of extrapolation from mice.
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An edible mushroom, sold as powder and capsules, popular in nootropic marketing.
Laboratory and animal work on nerve growth factor is genuinely interesting, and it is what almost every confident claim rests on. Human trials are very few and very small - a handful of studies in older adults and in menopausal women reporting modest improvements in mood or cognition. Nowhere near enough to call it effective.
Small studies used roughly 1 to 3 g daily of powdered fruiting body.
Recorded because a person who has decided to try something will find a number somewhere, and a forum's number is worse than a trial's. It is not a recommendation, and the right amount for you depends on things only a doctor who knows your history can weigh.
Generally well tolerated. Skin rashes and breathing difficulty have been reported, and anyone with a mushroom allergy should avoid it. Little data in pregnancy. Products vary widely in whether they contain mushroom or grain filler.
Imported and expensive relative to the evidence behind it.
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