Serotonin (also known as 5-hydroxytryptamine or 5-HT) is also considered a hormone. Most commonly, people are aware of serotonin's role in the central nervous system (CNS).

Serotonin plays a vital role in regulating various bodily functions, including the following noted below. Digestion Approximately 90% of the body’s serotonin is produced in the gut [1 ...

Serotonin is a hormone that contributes to mood, appetite, behavior, sleep, breathing, fear, digestion and stress response, per Harvard Health. Low levels of serotonin can negatively impact mental ...

The serotonin-deficiency hypothesis has been the basis for understanding depression but has faced criticism. Some studies suggest a reduction in serotonin release capacity among depressed individuals.

Serotonin, which is commonly known as the “feel-good” brain chemical that keeps your spirits up, is closely tied to your gut health. In fact, 95% of serotonin is produced in the gut.

Serotonin is nature's own appetite suppressant. This powerful brain chemical curbs cravings and shuts off appetite. It makes you feel satisfied even if your stomach is not full. The result is ...

(The drugs raise levels of serotonin activity by slowing down the neurotransmitter’s absorption by neurons.) Today, the serotonin hypothesis is still the explanation most often given to patients with ...

Using mice, scientists at the Okinawa Institute of Science and Technology (OIST) and their collaborators from Keio University School of Medicine have studied the main source of serotonin in the brain ...

New research reveals an intriguing connection between low levels of the chemical serotonin and the brain fog seen in some long COVID patients. The findings point the way to one possible treatment.