Psilocybin Psilocybin, the psychoactive compound present in "magic mushrooms," has become utilized for ceremonial and medicinal functions among Indigenous peoples for millennia. Psilocybin has a hallucinogenic impact on the brain. In its purest type, LSD appears like a white or colorless crystalline powder, has no odor, and may style bitter. https://www.tumblr.com/lsdvibes/757469329295048704/historyoflsd?source=share