S-Acetyl-L-Glutathione powder raw material suppliers & manufacturers in China, S-Acetyl-L-Glutathione is the most potent glutathione variant on the market today. Glutathione is one of the most potent antioxidants the body naturally produces (and the only one that is intracellular), and it has been shown to neutralize free radicals, detoxify the liver and improve immune system function.