What is serotonin primarily recognized as?

Serotonin is primarily recognized as a type of neurotransmitter, which is a chemical messenger that transmits signals in the brain. This classification is crucial because neurotransmitters are responsible for relaying messages between neurons and other cells in the body. Serotonin plays a significant role in various functions, including mood regulation, appetite, and sleep.

While serotonin does have some hormonal properties and can affect mood, its primary role is as a neurotransmitter. This distinction highlights its function in the nervous system rather than categorizing it simply as a chemical in the brain or an essential nutrient. Therefore, understanding serotonin in the context of its neurotransmitter role is vital for grasping its importance in both mental health and overall physiological processes.