The hydroxyl radical can damage virtually all types of macromolecules: carbohydrates, nucleic acids (mutations), lipids (lipid peroxidation), and amino acids This makes it a very dangerous compound to the organism.
Karnozin Extra is able to scavenge 71,7% of hydroxyl radicals comparing to 48,8% (pure L-carnosine substance), and 42,7% (L-carnosine from other food supplements)