This document discusses various factors that influence food choice, including economic, cultural, and health factors. It also explains the digestion process in the gastrointestinal tract and the breakdown of nutrients. The document provides information on the major nutrients in different food items and their digestion. It explores the relationship between diet and vision, the impact of calorie labeling, and the reasons behind the high trend in sugar consumption. Additionally, it discusses the effects of a sedentary lifestyle and the benefits of healthy food. The document concludes with information on the DASH diet for preventing cardiovascular disease.