Serotonin reuptake inhibitors (SRIs) are a class of drugs that affect the brain’s serotonin system, and doctors most commonly prescribe them as antidepressants. SRIs increase the levels of serotonin ...

Scientists have discovered two human gut microbes that generate serotonin, revealing how microbial chemistry can shape gut movement and nerve connectivity, and opening new possibilities for treating ...

Researchers have identified a mechanism by which acetylcholine, a neurotransmitter best known for its role in muscle control ...

Research shows that reward-based learning requires the two neuromodulators to balance one another's influence -- like the accelerator and brakes on a car If you've heard of two of the brain's chemical ...

Serotonin is a hormone and neurotransmitter—a chemical messenger that transmits signals between nerve cells in the body. Serotonin has a positive influence on the cardiovascular system and the ...

Exercising regularly can increase your serotonin levels and improve your mood. Stress and a lack of sun exposure can decrease your serotonin levels. Managing your serotonin levels involves stress ...

Researchers have identified two gut bacteria that can produce serotonin, a key chemical that regulates bowel movements. In experiments with mice lacking serotonin, the microbes boosted serotonin ...

Major depressive disorder (MDD) is a severe form of depression characterized by a persistent low mood, hopelessness, ...

You’ve probably heard about serotonin, the molecule known as the “happy hormone.” It’s widely thought to play a role in mood, sleep, learning, memory, digestion, and more—in fact, scientists think it ...

LONDON (Reuters) - Fluctuating levels of the brain chemical serotonin, often brought on when someone hasn't eaten or is stressed, affect brain regions that enable people to regulate anger, scientists ...

The simple act of observing others cope with a traumatic experience can increase our capacity for resilience and prevent the pathological states that can result from it, notably depression.