http://io9.com/5810379/want-to-bulk-up-eat-your-apples
"A substance found in the peel of an apple not only prevents muscle wasting, but also helps muscles grow more. Ursolic acid is currently used in cosmetics and is rumored to be able to help with some types of cancer. This new research shows that it's good for more than that, and could be a lifesaver for anyone trying to help their muscles along."
