Natto™ PGA is the biosynthetic gamma polyglutamic acid, polypeptide of the amino acid L-glutamic acid, formed by bonding between alpha amino group and gamma carboxyl group. Natto™ PGA has the following claims:Totally naturally occurring ingredient, non-toxic, biodegradable and editable;Excellent moisturizing effect;Anti-oxidant and effective to skin pigmentation problem;Unique sensory skin feel and improvement.