Enzymatic and nonenzymatic browning reactions of amino acids and proteins with carbohydrates,
oxidized lipids, and oxidized phenols cause deterioration of food during storage and processing. The
loss in nutritional quality and potentially in safety is attributed to destruction of essential amino
acids, decrease in digestibility, inhibition of proteolytic and glycolytic enzymes, interaction with
metal ions, and formation of antinutritional and toxic compounds.