Researchers are cautiously optimistic about using psilocybin (the active part of 'magic' mushrooms) to reduce anxiety in some situations. Small clinical trials, especially in people facing life‑threatening illness, often showed falls in anxiety after carefully guided psilocybin sessions paired with therapy. However, most studies are small or early stage, so scientists say bigger and more rigorous trials are needed before psilocybin can be called a proven treatment. Scientists have ideas about how psilocybin might help. Lab and brain‑imaging studies suggest it acts on serotonin receptors, can make brain circuits more flexible (called neuroplasticity), and can change activity in brain networks linked to self‑focused worry. But biological markers are not consistent yet, and many questions remain about who it helps, how long benefits last, and any longer‑term risks.