Antioxidant Benefits of Apples. Since most of the polyphenols in apples function as antioxidants, it's not surprising to see so many health benefit studies focusing on the antioxidant benefits from apple.
Particularly strong is the ability of apples to decrease oxidation of cell membrane fats.
This benefit is especially important in our cardiovascular system since oxidation of fat (called lipid peroxidation) in the membranes of cells that line our blood vessels is a primary risk factor for clogging of the arteries (atherosclerosis) and other cardiovascular problems.
Apples' strong antioxidant benefits are also related to their ability to lower risk of asthma in numerous studies, and their ability to lower risk of lung cancer. In addition to their unusual polyphenol composition, apples also provides us with about 8 milligrams of vitamin C.
While that amount is not a lot, it's still important, especially since the recycling of vitamin C in our body depends on the presence of flavonoids and apples do an amazing job of providing us with those flavonoids. Source is here.