Ian Dagnall / Alamy
Veg Out
Here's another reason to load up on spinach, broccoli, and Swiss chard. These dark greens are excellent sources of vitamins A and C, which bodies need to help produce lots of sebum (the oily substance from your scalp that acts like a natural conditioner). According to New York nutritionist Cynthia Sass, you should consume at least three cups of green produce per week.