Serotonin is often referred to as the "happiness molecule." It plays a critical role in affecting mood levels and is also a neurotransmitter that sends signals within the brain and the body.

New research reveals that sleep deprivation sends aberrant signals through the vagus nerve, triggering a serotonin surge that can kill gut stem cells.

If you've heard of two of the brain's chemical neurotransmitters, it's probably dopamine and serotonin. Never mind that glutamate and GABA do most of the work - it's the thrill of dopamine as the ...

In a discovery that could guide the development of next-generation antidepressants and antipsychotic medications, researchers at the Icahn School of Medicine at Mount Sinai have developed new insights ...