For many teenagers, the transition to a veg lifestyle can be tough, especially if their parents are unfamiliar with or unsupportive of the change. That’s where Michael Greger, MD, comes in. An animal flu expert who specializes in clinical nutrition, Dr. Greger is the director of Public Health and Animal Agriculture for The Humane Society of the United States (HSUS). His new monthly advice column will appear on Humane Teen, the HSUS’s website for teens. Dr. Greger will field questions about a variety of topics ranging from health, diet, and nutrition to animal wellness issues. In his first column the do-good doctor tackles swine flu prevention.