Adding a little dark chocolate to a training diet may effortlessly improve endurance performance, according to a new study of sports nutrition. The findings provide ammunition both for athletes looking for an edge and those hoping for an excuse to indulge.

I've been on a no-sugar, no-carb, no-alcohol cleanse this month. (Basically a Paleo diet.) I usually have small amounts of dark chocolate when doing these cleanses... maybe feeling a little less guilty about that now.