This document discusses the importance of nutrition in preventing cancer. It notes that 20% of cancers are related to poor nutrition, excessive alcohol, obesity, and inactivity. It then provides information on the main food categories - protein, carbohydrates, fats, and vitamins. Each category is defined along with examples of foods that contain them. The document also explains what a Nutrition Facts label contains, such as serving size, calories, nutrients to limit/get enough of, and footnote information on daily recommended intake amounts. E numbers for food additives are also defined, with some to take care with like nitrites.