At my salon we use a sulfate and parabens free shampoo called Cocoa Keratin Daily shampoo. We had to get it online though, a site called Beyas. It's the best we've had so far so I think you should take a look at it. There's also one called Pro naturals moroccan argan oil shampoo, it's really mild and I recommend it for people who have had hair treatments. They also have a conditioner.