Sodium Lauryl Sulfoacetate (SLSA) is a very similar sounding product, and is often used the same way in bath products. Some people would consider SLSA natural since it is derived from coconut and palm oils. It does conform to Ecocert's natural and organic cosmetic standard and is 100% of natural origin. SLSA is a much larger molecule than SLS and therefore is classified as a safe, skin-friendly surfactant because it can not penetrate the skin. It has become the standard foaming agent for "natural" bath products. We will not mark our products with SLSA as All-Natural due to the amount of material processing needed to manufacture SLSA.