I've not read any strong science behind it.
Here's a formula from Life Extension that has that ingredient. I respect LE but some of their skin products are a bit overhyped. Not to mention overpriced. This one is not too expensive though.
I posted this before on a different thread that you posted about the same thing, but yes I have used ViperVenom by GardenofWisdom.com and found it effective but you have to use it as directed: for 30 consecutive days and only on targeted areas not all over your face.