10.1016/j.foodchem.2019.125479
Siyu Zhang and Casimir C. Akoh investigate the enzymatic synthesis of 1-o-galloylglycerol (GG) using a food-grade lipase (Lipozyme? 435) and optimizes the reaction conditions to achieve a yield of 76.9% ± 1.2%. GG was characterized by various techniques and found to have higher water solubility and hydrophilicity compared to gallic acid (GA) and propyl gallate (PG). The antioxidant properties of GG were evaluated using ferric reducing antioxidant power (FRAP), hydrogen peroxide (H2O2) scavenging, 1,1-diphenyl-2-picrylhydrazyl (DPPH), and 2,2-azinobis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS+) assays, revealing that GG exhibited superior scavenging capacity compared to GA and PG. The study suggests that GG could serve as a water-soluble antioxidant alternative to GA for food and cosmetic applications, offering enhanced solubility and potentially safer use due to its lower acidity and reduced likelihood of cellular penetration and cytotoxicity.