Serotonin is often referred to as which of the following?

Serotonin is often referred to as the "happy hormone" because it plays a significant role in regulating mood, emotion, and feelings of well-being and happiness. It is a neurotransmitter that is crucial in mood regulation, and its levels in the brain have been closely linked to feelings of satisfaction and happiness. An imbalance in serotonin levels is often associated with mood disorders, including depression and anxiety, highlighting its importance in maintaining emotional health. This understanding of serotonin as a key player in promoting a positive mood underlines its designation as the "happy hormone."