Serotonin is a hormone belonging to the category of 5-hydroxytryptamine (5 HT). It is acting as a neurotransmitter in brain. This means the hormone is responsible for carrying the signals from one nerve cell to another throughout the body. It plays a vital role in regulating brain functions and coordinating the different body parts. Also, this substance is responsible for regulating mood, memory, sleep patterns, and performing other cognition-related jobs in the body; some of these studies have suggested that impairment in serotonin production can lead to clinical depression in some instances.
