I was reading through Wikipedia, and I found this statement:
I figured this was a good place to see what we do know about absorption and clearance of resveratrol."Reasons why recommending a population-wide increase would be premature: Little is known about the absorption and clearance of resveratrol, the identities of its metabolic products, or its effects on the liver. The research on resveratrol has focused on its short-term effects and has been mainly done on non-human models."