The Maillard reaction is an example of a non-enzymatic reaction in food browning. It is a chemical reaction which takes place between the amine group of a free amino acid and the carbonyl group of a reducing sugar,[1] usually with the addition of heat. The sugar interacts with the amino acid, producing a variety of odors and flavors. The Maillard reaction is the basis of the flavoring industry, since the type of amino acid involved determines the resulting flavor; it also produces toast.