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Serotonin Levels

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

Serotonin levels refer to the amount of serotonin, a neurotransmitter, present in the brain. This neurotransmitter plays a crucial role in regulating mood, sleep, appetite, and other physiological functions.

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