Digestive enzymes are biological catalysts crucial for breaking down complex food molecules into simpler, absorbable forms. Amylase breaks down carbohydrates (like starch) into sugars. Proteases (e.g., pepsin) digest proteins into peptides and amino acids. Lipases break down fats into fatty acids and glycerol. This enzymatic action is vital for efficient nutrient absorption, providing energy and building blocks for cellular repair and overall metabolic functions.