Catherine Price, author of "Vitamania," delves into the fascinating world of vitamins and their cultural impact. She discusses how vitamins revolutionized America's processed foods, from the historical quest for understanding nutrients to the marketing of fortified products. Price reveals insights on the production processes of vitamins, like the surprising origins of vitamin D from sheep's wool. The conversation also navigates the complexities of Recommended Dietary Allowances and critiques the reductionist view of food, urging a return to whole foods for better health.