Tag Archives: Sleeping Pills

Sleep Study Part 4: Human Peptide Hypocretin Linked to Happiness

happiness

Happiness may not come from your family, friends, or wealth, at least according to a new study. Rather, it comes from a peptide.

Led by the University of California Los Angeles, an international team of researchers has linked levels of hypocretin (a human peptide and neurotransmitter) to happiness. They found that the levels of hypocretin soared when we are happy, and also decreased when we are sad.