Which neurotransmitter is associated with regulating sleep, mood, depression, and anxiety?

Serotonin is a key neurotransmitter involved in the regulation of various physiological functions, particularly in relation to sleep, mood, depression, and anxiety. It plays a crucial role in stabilizing mood and contributing to feelings of well-being and happiness. When serotonin levels are balanced, individuals typically experience better sleep patterns and reduced symptoms of depression and anxiety.

Research indicates that low serotonin levels are often linked to mood disorders, which is why many antidepressants aim to increase serotonin availability in the brain. Additionally, serotonin influences the sleep-wake cycle, helping to regulate both the initiation of sleep and the maintenance of sleep through its action on specific receptors in the brain. Thus, its multifaceted role in emotional regulation and sleep underscores its importance in mental health.