Cleansing Agent

No known benefits

Sulfates description

In cosmetics, this large group of ingredients is used mainly as cleansing agents in skincare and hair-care products; they include sodium lauryl sulfate, ammonium lauryl sulfate, and sodium laureth sulfate. Many consumers are concerned of sulfates in their cosmetics products because of widespread misinformation. Sulfates are not a problem, but once organizations and companies build up fears among consumers about certain cosmetics ingredients there’s almost no going back, the damage is done. In reality there’s absolutely no research showing that sulfates are a problem in skincare or hair-care products, other than causing sensitivity, but that is also true for the sulfate-free cleansing agents that some cosmetics companies advertise and sell. And, whether or not a cleansing agent will cause sensitivity depends on the amount of sulfate and on other ingredients present in a specific formula. Following are some of the most typical unsupported comments about sulfates: “Sulfate-free shampoos and cleansers are better for hair and skin.” No research has shown that to be even remotely the case. Sulfates are supposed to be terribly drying and damaging to hair, when in fact they function no differently from the cleansing agents in sulfate-free shampoos. Almost every company that touts the fact that they don’t contain sulfates do use detergent cleansing agents such as sodium lauryl sulfoacetate, disodium laureth sulfosuccinate, sodium lauroyl sarcosinate, cocamidopropyl hydroxysultaine, sodium cocoyl isethionate, cocamidopropylamine oxide, and sodium methyl 2-sulfolaurate. Why those are supposedly any better for skin is never explained, and no research is ever cited because none exists. Sometimes these companies list those ingredients as being derived from or coming from coconut to make them sound natural and, by association, better for skin but they all end up being primarily synthetic. That doesn’t make them bad in any way; it’s just that the claims are completely disingenuous. What you need to know is that both the sulfate-free cleansing agents and the sulfate versions can be drying and sensitising depending on the formulation and/or your skin’s own reaction. All of these cleansing agents remove oil and the gunk from styling products, which is exactly what a shampoo should do. “Sulfates in cleansers are cheap.” This one is true, but so what? Lots of ingredients, both natural and synthetic, are cheap, others are expensive, which has absolutely nothing to do with quality or efficacy. The first ingredient in sulfate-free shampoos is water (about 90% water) and no other cosmetic ingredient is cheaper than that! “Sulfates are used in floor cleaners and are corrosive.” This can be true, when used in large amounts and when left on surfaces over time, but so what? Salt is used to melt ice on the roadway, but it also rusts cars, which doesn’t make salt bad; it just depends on how much you use and how long you leave it on something. This is also true for the alternative sulfate-free shampoos and cleansers as well; they can also be corrosive over time depending on how much is used and how long it is left on. “Sulfates can be sensitising.” This can absolutely be true, but again, so what? As a general category, sulfates are not sensitising when used in appropriate amounts in shampoos and cleansers and the same is true for sulfate-free alternative cleansing agents. All of the research about sulfates being sensitising are from patch tests where a concentration is left on skin under a bandage for 24 hours, which is not how a cleanser or shampoo is used. Sodium lauryl sulfate is considered one of the more sensitising cleansing agents and we recommend avoiding it when it is high up on the ingredient list, but that’s NOT because it’s a sulfate; rather, it’s because of its interaction with skin.

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not Rated