Maintain Biotech Co.,Ltd.a company focusing on the leading coenzyme industry and produce high value-added coenzymes products . Our main products NAD,NADH, NMN and NR are widely used in Dietary Supplements, cosmetic products & Pharmaceutical products. Biocatalysis is our main technology . Enzymatic synthesis geting less impurities, highest yield, and 0 chemical solventsenzymatic synthesis is Green enzyme technology ,no toxicAqueous reaction system ,100% water condition.