Epigallocatechin-3-gallate + Ascorbic acid

The combination of epigallocatechin-3-gallate (EGCG) and ascorbic acid (Vc) represents a synergistic pairing that enhances the stability and biological activity of EGCG, which is naturally unstable and easily oxidized[1][2]. This combination has been studied for various therapeutic applications, particularly for its antioxidant properties and potential health benefits.\n\n## Pharmacological Properties\n\nEGCG combined with ascorbic acid demonstrates significantly improved stability across different temperatures, pH values, and in simulated gastrointestinal fluids[1]. Research shows that this combination can increase the recovery rate of EGCG to 98.90% after incubation for 4 hours at 80°C, and to 91.82% after incubation for 6 hours at pH 8[1].\n\nThe addition of glycerol to this combination further enhances the stability and biological activity of EGCG. Studies indicate that EGCG combined with ascorbic acid and glycerol exhibits superior protection effects compared to EGCG alone or EGCG with just one of these components[1][2].\n\n## Therapeutic Applications\n\nThe EGCG and ascorbic acid combination has been investigated for several therapeutic applications:\n\n**Uric Acid Reduction**: The combination shows significant uric acid-lowering activity in hyperuricemia models. It affects various enzymes and transporters involved in uric acid metabolism, including xanthine oxidase (XOD), adenosine deaminase (ADA), and transporters like GLUT9, URAT1, ABCG2, and OAT1/2[2].\n\n**Potential for Pulmonary Fibrosis**: EGCG is being studied for idiopathic pulmonary fibrosis (IPF), with clinical trials examining its safety and efficacy[7]. While these trials focus on EGCG alone, the enhanced stability provided by ascorbic acid could potentially benefit such applications.\n\n**Antitumor Activity**: It's important to note that EGCG may interact with certain cancer treatments. Research indicates that EGCG can antagonize the anti-cancer activity of bortezomib (PS-341/Velcade) in multiple myeloma cells[4][6]. This interaction appears to be related to the vicinal diol moiety on EGCG rather than its antioxidant function[4].\n\nThe combination of EGCG and ascorbic acid represents a promising approach to enhance the stability and therapeutic potential of EGCG, opening possibilities for its application in various medical fields including metabolic disorders, fibrotic diseases, and potentially as an adjunct in certain treatment regimens.

Other names

EGCG combined with ascorbic acidEGCG + Vc