Many dermatologists still hold to the myth that foods don't really affect acne, and that patients can eat whatever they'd like. But a growing body of research points to a strong correlation between certain nutrients--including zinc and omega-3 fatty acids--and clear skin.

The Clear Skin Diet (Cumberland House Publishing, 2007) is an essential resource for any retailer who wants to help shoppers make the connection between what they put in their bodies and their outer appearance. Authors Alan C. Logan, N.D., and Valori Treloar, M.D., CNS, investigate study after study, revealing surprising findings in easy-to-understand language. I highly recommend it to supplements and personal care managers.