Allosteric describes regulation at a distance: a molecule binds to a site on an enzyme or protein other than the active site, and that attachment changes the protein’s shape, altering its activity elsewhere. This remote-control mechanism lets cells fine-tune metabolism: feedback inhibitors bind allosterically to slow an enzyme when product is abundant, while activators speed it up when more output is needed. Hemoglobin’s cooperative oxygen binding is the most famous allosteric behavior, and many digestive and metabolic enzymes are regulated this way. In food science, allosteric regulation explains how processing conditions and small molecules can switch enzyme activity on or off, knowledge that brewers, bakers, and biotechnologists exploit to control fermentation and flavor development with precision.