So far, I've been reading that laurel sulfates put into products to cause it to foam up, but it causes irritation to the skin, eyes, etc. Depending on how sensitive people's skins and how much SLS there is in the product, it can go from mild irritation and dryness to causing large amounts of swelling and even skin corrosion. My skin tends to dry out so I don't really need a product that irritates or dries me out even more so I'm just cutting that out for my sake. Likewise, I don't need a product to foam up to show me that it's working. I'm slowly shifting into the stance of, "If I don't need it, then I won't use it." XD