Serotonin Theory

The Serotonin Theory of depression suggests that low levels or activity of serotonin, a neurotransmitter in the brain, are linked to symptoms of depression, such as sadness, fatigue, and loss of interest. Serotonin helps regulate mood, sleep, and appetite. Many antidepressant medications work by increasing serotonin levels or its activity in the brain, aiming to improve mood and emotional well-being. However, it's important to note that depression is complex, and while serotonin plays a role, other factors are also involved in its development and treatment.