There’s no evidence that it does anything. David Sinclair is the the one that discovered that altering a protein class called sirtuins can limit aging in yeast. Resveratol works on those proteins. I don’t know of any negative effects to taking it (I don’t think there are but I don’t want to mislead) but there is literally no evidence after a ton of trials that it actually has any effect on anything in humans. The thing is that there are some scientists that are incredibly smart, even among other researchers, and incredibly gifted at designing creative experiments but then draw insane unsupported conclusions from the results.

So basically if you want to take it fine and personally I wouldn’t say I’m completely convinced it’s useless (though it sure looks like it is), but expect it to just do nothing and understand his claims are not backed by his own data.