Researchers at Cornell University found that apple skins (from Red Delicious apples) had powerful antioxidant (stronger than vitamin C) and anti-proliferative effects. Specifically they tested certain flavanoids from apple skins against certain liver cancer and breast cancer cell lines and found that both were potently inhibited. This may help explain some of the treatment strategies used by certain natural anti-cancer therapies such as Gerson Therapy, or other juicing regimens that include heavy use of apples. One of the problems though is that the skins of the apples also have the most pesticides, so remember to only use organic apples since peeling them takes out most of their anti-cancerous properties. It may be even more beneficial when juicing apples to save the fiber and then eat it later since some of the skin components will not make it into the juice (don’t mix it in with the juice or you may impair nutrient absorption). Hopefully, Steve Gomberg can give us a recipe for how to do this in a palatable way.
 
J Agric Food Chem. 2008 Nov 12;56(21):9905-10. Epub 2008 Oct 2.