Which neurotransmitter is primarily involved in mood regulation?

Serotonin is primarily involved in mood regulation due to its significant role in the brain's emotional response systems. Research indicates that serotonin levels influence mood, anxiety, and overall emotional well-being. Low levels of serotonin are often associated with mood disorders such as depression and anxiety disorders. This neurotransmitter helps to regulate various functions, including sleep, appetite, and mood, making it a critical player in maintaining emotional balance.

Dopamine, while also involved in mood and emotional responses, primarily plays a crucial role in reward processing and motivation. Norepinephrine is more associated with arousal and alertness, and while it can influence mood, its primary functions lean towards the fight-or-flight response rather than direct mood regulation. Acetylcholine is involved in many functions including attention and memory but does not have a primary role in mood regulation. Therefore, serotonin stands out as the key neurotransmitter for mood stabilization and regulation.