When I think of free radicals, I think of people waving signs in the street, protesting this or that government decision. But there is another kind of free radical. This kind of free radical is related to an atom or molecule that "has a single unpaired electron in an outer shell." (Thank you, Wikipedia!) I don't pretend to understand them, but I don't have to. The makers of Juice Beauty Green Apple Age Defy Serum do and they know that free radicals should be reduced when possible. This product reduces free radical aging in skin cells and can help your skin feel and, hopefully, with time, look younger.