Chocolate is also known to brighten the skin, to the extent that many have even applied chocolate to their skins during their spa sessions. It is believed that vitamin A and E in chocolate helps keep in the skin's moisture, thereby slowing the process of aging and wrinkling. Magnesium in chocolate helps relax fatigued muscles. And if you were wondering why chocolate makes you feel so good, there's an explanation for that, too! The phenylethylamine in chocolate is believed to be responsible for the feelgood factor that overcomes those who have just indulged.