Serotonin (also known as 5-hydroxytryptamine or 5-HT) is a naturally occurring substance that functions as a neurotransmitte to carry signals between nerve cells (called neurons) throughout your body.
Most commonly, people are aware of serotonin's role in the central nervous system (CNS).
There's no single cause of low serotonin levels, but it typically occurs for one of two reasons:
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