i think you may be wrong about one thing mrs D. pine bark extract is not the same thing as grape seed extract. grape seed extract you can find in many things, lotions, face cleansers. but pine bark extract you do not. also if u look into iherb's description, there are plenty more additional uses for pine bark that grape seed doesn't touch, periodontal disease, cholesterol(for the most part), hypertension, ADD, asthma, and allergies.

quercetin i can see helping out with some of them, but grape seed(resveratrol) i dont think so.