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Serotonin molecular structure

What is serotonin

Serotonin is a neurotransmitter that acts on the transmission of messages through synapsis, or adjacent nerve cell clustering.

This neurotransmitter acts as a vasoconstrictor, inhibits the production of hydrochloric acid in the digestive tract and stimulates contraction of the intestinal wall.

Its function in the central nervous system and its effects on behavioral changes are being the subject of many studies and research.


Serotonin is formed from a precursor amino acid, tryptophan, from foods that have a high protein content, such as meat.

Serotonin and nerve impulse

During the neurotransmission process, serotonin is released from one nerve cell (neuron) to another until it gives way to the formation of a nerve impulse, which can become stimulus or inhibition.

After its performance, serotonin passes again from the synaptic space to the neuron that released it, so it can be recycled and reused at another time. However, it can also be converted into an inactive molecule if it is not reused.