Psilocybin microdosing capsules are capsules that contain a small, sub-perceptual dose of psilocybin, a naturally occurring psychedelic compound found in certain types of mushrooms. Microdosing refers to the practice of taking very small amounts of a psychedelic substance, typically in the range of 0.1-0.5 grams, in order to experience subtle changes in mood, cognition, and behavior without the intense, full-blown "trip" associated with larger doses. Psilocybin microdosing is often used for therapeutic or self-improvement purposes, and proponents of the practice claim that it can help to reduce anxiety, improve mood, and increase creativity and productivity.