An enzyme is a protein, or a protein-based molecule, that acts as a catalyst, starting or speeding up certain chemical reactions. Life would not exist without enzymes. Enzymes are required for digestion. They help break down food into its most basic components so nutrients can be absorbed. Each type of enzyme specializes in the breakdown of certain foods – fats, carbohydrates, or proteins. Digestive enzymes from webber naturals are available in a variety of combinations.