Serotonin is a neurotransmitter, a biochemical used to send and receive messages within our nervous system. Among other things, serotonin allows us to feel satisfied, empathy, and love. Serotonin is soothing and prevents us from over reaction under stress. Studies show that low serotonin levels are correlated with people who are obsessive, impulsive, depressed, bulimic, or number of other mental illnesses. Some drugs, like Ecstasy, create a surge followed by a deficit of serotonin.

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