Just ran across a fake business insider news story claiming that Reviva is what makes Bill Gates so smart. It then goes on with a lot of the same text and pictures from the fake CNN stories captured in other posts here -- including the pictures of Stephen Hawking and Denzel Washington -- and notes that CNN broke the story first.
So Reviva is just as fake as Neurocell and all the others.
Of course the "news" story wouldn't be complete without a link for buying Reviva.
Just don't do it.