Where can I get the resveratrol concentration in juice tested? How much would this cost? I raise grapes in my backyard and make grape juice from them. I think the vines area type of concord; but they are a cutting of a cutting of a cutting . . . that originally came from my Grandfather's backyard in Hamilton. So I really don't know what they are. I've always been curious about the concentration of resveratrol in the juice.
Baltimore County Maryland