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How Does Serotonin Work?

Serotonin, which is also called 5-hydroxytryptamine, is a chemical neurotransmitter that transmits signals in the brain. Serotonin is found in the brain, the digestive tract and in platelets, and plays a role in many psychological and body functions.

  1. Tryptophan

    • Serotonin is synthesized in different parts of the brain and body. From there, it can be stored or released. Tryptophan is an amino acid that makes up serotonin.

    Psychological Functions

    • The majority of a person's brain cells are influenced by serotonin in one way or another. Some of the influenced cells include those related to mood, memory/learning and social behavior.

    Body Functions

    • Serotonin also influences the functioning of the heart, muscles and other parts of the endocrine system. It helps regulates blood flow to the brain, heart and gastrointestinal tract.

    Serotonin Imbalance

    • Reduced serotonin levels have been found in depressed people. Possible causes are low serotonin production, lack of serotonin receptor sites or a shortage in tryptophan.

    Genetics and Environment

    • A person's genetics and environment can play a role in how a serotonin abnormality will manifest. Serotonin problems contribute to many health related problems such as migraines, cardiovascular problems and hypertension.

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