Hello Gatstons Girl!
I've never seen this shampoo - so I can't help you there.
The problem with knowing what Cel U Plex is, is that manufactureres are always giving ingredients new names to make them sound unique. It may be a really great ingredient or it may be a common ingredient that is good but that you can find in other shampoos as well.
I know this information doesn't help you at all! <img src="/images/graemlins/smile.gif" alt="" /> I just wanted to say hello and to make sure you don't feel ignored!