What are endorphins primarily classified as?

Endorphins are primarily classified as neurotransmitters that serve crucial functions in the nervous system. Their primary role is to act as natural painkillers by binding to the opioid receptors in the brain, which reduces the perception of pain and promotes a feeling of well-being or euphoria. This pain-relieving and mood-enhancing capacity is particularly evident during activities like exercise, laughter, and moments of excitement or stress.

The classification of endorphins as neurotransmitters distinguishes them from other substances that serve different physiological roles, such as proteins involved in digestion, hormones responsible for growth regulation, or amino acids that contribute to muscle contraction. Understanding the specific role of endorphins as neurotransmitters helps highlight their importance in both pain modulation and emotional regulation, making them significant in various neurological and psychological contexts.