“Human Nutrition: What Your Body Does With Food” introduces how the body digests food, absorbs nutrients, and uses energy through metabolism. The video explains the gastrointestinal tract, accessory organs, enzymes, and key processes such as breaking carbohydrates, fats, and proteins into glucose, fatty acids, and amino acids. It also covers absorption in the small intestine, waste elimination, and digestive conditions such as acid reflux and lactose intolerance. Beyond digestion, the lesson explores metabolism, insulin, insulin resistance, metabolic syndrome, processed foods, simple versus complex carbohydrates, nutrient density, calories, and the difference between hunger and appetite. With strong links to life science, health, and nutrition curricula, this educational overview supports understanding of body systems, wellness, and informed food choices. Part of the "Human Nutrition" series.