
How does science know whether eating a balanced diet or drinking collagen imparts an anti-aging effect in skin? Cosmetics & Toiletries posed these questions and others to renowned dermatologists Zoe Diana Draelos, M.D., and Alan Dattner, M.D. Following are excerpts adapted from part II of our five-part podcast series, "How Nutrition Impacts Beauty." Hear more by clicking on the podcast at the bottom of the page.