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ALA is a vitamin-like compound, first isolated from potatoes. It was designated lipoic acid over 50 years ago, as it was commonly found associated with lipids, or fatty areas of the cell. ALA was subsequently found to be soluble in water and also able to penetrate lipid environments, a property lending considerable versatility to this nutrient.
ALA is a nutrient that comes close to being a vitamin. Vitamins are nutrients required for health but, for the most part, produced in insufficient amount (or not at all) by the cells of the body. Under certain conditions of cellular stress, ALA may not be synthesized in sufficient quantities. Thus it could be classified a para-vitamin or conditionally essential nutrient.
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