NOW AlphaSorb-C contains the Vitamin C metabolite, Threonic Acid, which has been shown to enhance cellular uptake of Vitamin C. This buffered, non-acidic Vitamin C supplement also contains Alpha Lipoic Acid, an antioxidant known to help regenerate Vitamin C in the body. Furthermore, studies suggest that Alpha Lipoic Acid may enhance the body's utilization of Vitamin C. The addition of Bioflavonoids as synergists helps to create a well-absorbed, highly effective Vitamin C supplement. Vitamin C is best known as a highly effective antioxidant that can protect the body's cells and molecules from damage by free radicals. Some scientific evidence suggests that consumption of antioxidant vitamins may reduce the risk of certain forms of cancer. However, the FDA has determined that this evidence is limited and not conclusive.