This book describes the development of a healthy diet, covering aspects such as basic dietary principles, correct understanding of food, introduction to healthy foods, benefits of healthy eating and suggestions. It emphasizes the impact of food choices on the energy system. The failure of health and fitness plans is mostly due to lack of perseverance, and personal motivation is crucial for maintaining the plan. It introduces healthy foods such as honey, whole grains, nuts, and lean meat, and expounds on the benefits of a healthy diet in terms of physical health, economy, toxin intake, lifestyle and social life. It also gives suggestions such as determining calorie intake, choosing the right fats and carbohydrates, adjusting meal times, enjoying "cheat meals", chewing slowly and drinking plenty of water.