ENDORPHINS—OUR NATURAL PAINKILLER Last week I posted on Dopamine (Dopamine—The Pleasure Hormone), and two weeks ago on Serotonin (Serotonin—Our Natural Antidepressant). These are two of four feel-good hormones that affect our mind, mood and body. This week  I’m featuring a third: endorphins, a hormone your body releases as our natural painkiller plus promotes happiness. Dopamine is also a pleasure hormone, but endorphins function differently. Endorphins relieve pain naturally. When they attach to your brain’s reward center, dopamine is then released. Endorphins naturally sooth the runner’s aching muscles, then dopamine gets released to produce the well-known runner’s high. (You can also...