Apples - Peel and all

Traditionally, apple peels have been considered healthy because of their fiber content, as the peel contains about 75 percent of the dietary fiber in an apple. But a recent study has shown that the peel also contains most of the beneficial phytochemicals responsible for apples' anticarcinogenic effects.

Scientists processed more than 200 pounds of Red Delicious apples, and extracted phytochemicals from about 24 pounds of peel. They screened the compounds for anti-cancer effects in laboratory cultures of human liver, breast, and colon cancer cells, and identified a group of compounds with potent anti-cancer properties.

Specifically, 13 triterpenoids from the peels of Red Delicious apples were identified and confirmed to be highly effective against cancer. Exactly how and why these biochemicals seek and destroy cancer cells is still unknown. Apple consumption has previously been linked to a reduced risk of lung cancer, heart disease, and stroke.