energy foods

Photo: Thinkstock

5 of 6
End-of-Workday Cookies For Carbaholics
If you're one of those people who crave carbs in the late afternoon, pick up a pack of Fig Newtons. Carbs can help some people's brain produce serotonin, a neurotransmitter that regulates moods, explains Judith Wurtman, PhD, a co-author of The Serotonin Power Diet. Sweet and starchy snacks like these Newtons (40 grams carbs) are easy to digest, and the dried figs are densely packed with potassium as well as natural sugar.