I didn't know anything about Revitol so I went to Amazon to read customer reviews. It was pretty clear that most buyers decided that Revitol was a complete scam. 2 people said it worked, 13 said it did nothing (and that they thought the 2 that said it worked were probably plants).
It doesn't sound promising.
Vaniqa is legitimate. It didnt' work for me but it may for you. It was expensive.
Good luck!
-Julie