Glucono delta lactone
Glucono delta lactone is entirely plant-based. It is prepared by microbial (bacteria or yeast) fermentation of a carbohydrate source. Additional processing or chemical reactions are not involved in manufacturing glucono delta lactone. Corn is (and always has been) the major commercial source. Rice may be used as well. Some Companies uses rice by a method involving bacterial fermentation in order to produce leavened breads that are yeast-free.
Gluconolactone is a naturally occurring polyhydroxy acid (PHA) with metal chelating, moisturizing and antioxidant activity. Gluconolactone can be produced by enzymatic oxidation of D-glucose oxidation. Its ability in free radicals scavenging accounts for its antioxidant property. It is used in cosmetic product and as a coagulant in tofu processing. (NCI05)