Dopamine makes us feel good when we do things that are beneficial for our survival, like eating, drinking, and reproducing. But, did you ever wonder how is it that we can swallow “one more bite” of our favorite dessert, even after we are so full? For evolutionary purposes, thoughts of food and eating have been essential thoughts for our survival. When we find food, especially those highest in calories, we’re naturally compelled to eat as much as we can. In a hand to mouth existence this ensured our survival through lean seasons, and, it kept competitors from stealing our meals!
A study at Yale, http://www.livescience.com/23345-brain-chemical-triggers-overeating.html, showed that an area of the brain, the neostriatum, activates internal opioids, encephalins, to counteract the discomfort of our swelling stomach so that we can continue to eat! Overeating? Blame it on the encephalins!