The highest quality and most scientifically advanced multi vitamin, mineral and antioxidant formula in the world. Contains natural unesterified vitamin E from mixed tocopherols. Unesterified vitamin E is more effective in blocking formation of nitrosomines in the digestive tract. Contains a unique combination of organic and inorganic selenium for maximum benefits. N-Acetyl-Cysteine is a precursor of glutathione in the body and a protected sulfur-containing amino acid. It is a more stable and effective antioxidant than the sulfur-containing amino acid L-cysteine. The chelated copper in this product is specially coated to prevent interaction with other nutrients.