Summary: Serotonin. At this stage, most of us have at least a vague sense that serotonin is one of the primary neurotransmitters that makes us feel all warm and fuzzy and happy.
Summary: Serotonin. At this stage, most of us have at least a vague sense that serotonin is one of the primary neurotransmitters that makes us feel all warm and fuzzy and happy.