"Hormones are your body"s chemical messengers. Once released by glands into your bloodstream, they act on various organs and tissues to control everything from the way your body functions to how you feel.
One group of hormones is nicknamed the "feel-good hormones" because of the happy and, sometimes, euphoric feelings they produce. They"re also considered neurotransmitters, which means they carry messages across the spaces between nerve cells.
What are the four feel-good hormones? Dopamine, serotonin, endorphins, and oxytocin.
You can boost levels of these hormones with some simple lifestyle changes, like diet, exercise, and meditation, and possibly improve your mood in the process."