Psilocybin mushrooms, also known as magic mushrooms, are a natural psychoactive and hallucinogenic compound. The psilocybin found in mushrooms is converted to psilocin in your body and influences serotonin levels in your brain. Consumption will affect your mood, cognition and perception. Mushrooms are ideal for treating depression, smoking and other addictions and cancer-related symptoms. If you are trying mushrooms for the first time, it is important to start with a minimum dose to be safe.