"Human Nutrition: Preventing Nutritional Disorders" explains how diet, exercise, and lifestyle choices affect long-term health. The video defines nutritional disorders as largely preventable degenerative diseases and examines major nutrition-related conditions including heart disease, cancer, type 2 diabetes, obesity, and eating disorders such as anorexia and bulimia. Key concepts include risk factors, the Western diet, atherosclerosis, insulin resistance, BMI, energy balance, carbohydrates, protein, fat, hydration, aerobic and anaerobic exercise, and weight management. It emphasizes preventive health practices such as eating more fruits, vegetables, whole grains, and other plant foods; limiting saturated fat, sugar, sodium, and processed foods; and maintaining regular physical activity. This overview aligns well with health, life science, and physical education curricula focused on nutrition, disease prevention, body systems, and wellness habits. Part of the "Human Nutrition" series.