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Alpha-lipoic acid acts in conjunction with the B vitamins thiamin, riboflavin, niacin and pantothenic acid to convert sugars and fat into energy within the body. Alpha-lipoic acid, together with its active metabolite dihydrolipoic acid, are powerful antioxidants which uniquely are equally effective in supporting both the aqueous and lipid compartments of the cell. Alpha-lipoic acid helps to maintain healthy functioning of the immune and nervous systems. Alpha-lipoic acid also helps maintain healthy liver function.Alpha-Lipoic acid (also known as thioctic acid) is a vitamin-like substance which plays an important role in the body's energy supply processes. Alpha-lipoic acid is also important within the body as a powerful antioxidant capable of protecting both the lipid (cell membrane) and aqueous (cytoplasmic) cellular compartments from free radical induced damage. Alpha-lipoic acid is mainly obtained from the diet, although small amounts are also manufactured within the body. Red meat (especially liver, spinach and brewer's yeast are good sources of alpha-lipoic acid).