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Found Serotonin 1 time.

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1. Serotonin
A hormone , also called 5-hydroxytryptamine, which has the chemical formula C10H12N2O. It is produced in the pineal gland and found in blood platelet s, the digestive tract, and the brain . It is both a neurotransmitter (a substance that transmits nerve signals from neuron to neuron) and a vasoconstrictor (a substance that causes the blood vessels to narrow).

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