It’s just unnatural.
How about pterostilbene?
It's one of the two active ingredients in a new pill, the other being nicotinamide riboside.
See http://nymag.com/scienceofus/2016/08/is-elysium-healths-basis-the-fountain-of-youth.html
I dunno...I suspect that somehow, Pterodactyls were involved in the making of it...and that pturbs me greatly.
o.O