Good Hair Thickening Shampoos

[DepressedByHairLoss]

I was using Nexxus Diametress Volumizing Shampoo for a while and although I had less hair fall using this, it really didn't make my hair look any thicker. I tried Neutrogena Volumizing Shampoo recently and although the initial results were that my hair looked thicker, the results aren't as great now. What are some other good hair volumizing shampoos that make a person's hair look thicker and fuller?