What are some reactants when you eat food?

When you eat food, the primary reactants in your body are carbohydrates, proteins, and fats. These macronutrients are broken down through digestion, where enzymes and acids convert them into simpler molecules like glucose, amino acids, and fatty acids. Additionally, oxygen obtained from respiration plays a crucial role in the metabolic processes that convert these nutrients into energy. The overall process is a series of chemical reactions that fuel the body's functions.