Living Proof lathering shampoos are all sulfate-free. We carefully design our products to be gentle and create a rich creamy lather. Not all sulfate-free products can claim this. We believe, if you are looking for a gentle cleansing alternative, it does make sense to consider sulfate free shampoos. While sulfates are very effective cleaning agents that create big lather, they create big lather; however, over use can strip hair of its natural surface oils and make it feel rough, dry and brittle. It can also strip the scalp of its natural oils, leading to dryness and irritation. Examples of commonly used sulfate ingredients which provide big lather include Sodium Lauryl Sulfate, Sodium Laureth Sulfate, Ammonium Lauryl Sulfate, Sodium Laureth Sulfate.