Price got the idea for her book when her husband asked her the question, "What's a vitamin?" and Price found that she didn't have an answer. Vitamins, to spare you the suspense, are organic compounds that we tend to come across in food—and without which we would die. There are 13 human vitamins: A, C, D, E, K and seven B vitamins (thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyroxidine (B6), biotin (B7), folate (B9) and cobalamin (B12)). But if that was all Vitamania was about, it would have made for a short book. Instead Price explores how the discovery of vitamins has shaped our diet, and our perspective on health.