Food enzymes are chains of amino acids, which help break down food in a manner so that the body effectively use it. When foods deficient in enzymes are eaten, the body uses a considerable amount of energy for digestion. This explain why it is common to often feel tired after eating a big meal. The more enzymes the body has, the easiner it is to digest and absorb food properly. Enzyme shortage are commonly seen i patients suffering from chronic illnesses such as certain types of cancer, allergies, premature aging, skin disorders, and heart disease. An enzyme-deficient diet takes a tremendous tribute of the body.