The psychedelic compound typically found in mushrooms (psilocybin mushrooms). They’ve engineered bacteria to produce psilocybin in their cells and poop it out, in gram-scale concentrations that are higher than any other bioengineered organism to date. See our psilocybin spores (mushroom spores).
Psilocybin is similar to LSD in that its chemical structural backbone is the same (a substance called an “indole”). Its effects are similar to both LSD and mescaline and there appears to be some cross-tolerance among these three hallucinogens. Dried mushrooms contain approximately 0.5% psilocybin. The most effective dose seems to be about 5 mg, with higher doses causing some unpleasant effects.