Complex sentence: Polyunsaturated fatty acids (PUFA) contained in the outer shell make the lipoproteins especially susceptible to oxidation, however lipoproteins also contain antioxidants which protect the components, vitamin E and carotenoids being the two major naturally-occurring antioxidants in human lipoprotein.
Split into simpler sentences: Polyunsaturated fatty acids (PUFA) contained in the outer shell make the lipoproteins especially susceptible to oxidation. However, lipoproteins also contain antioxidants which protect the components, vitamin E and carotenoids being the two major naturally-occurring antioxidants in human lipoprotein.