PEG-80 Sorbitan Laurate vs Sodium Lauryl Sulfate: which is worse?

What is PEG-80 Sorbitan Laurate?

PEG-80 sorbitan laurate is a non-ionic surfactant and emulsifier produced by ethoxylating sorbitan monolaurate with 80 moles of ethylene oxide. It is highly water-soluble and used primarily for its solubilizing and mild cleansing properties.

What is Sodium Lauryl Sulfate?

Sodium lauryl sulfate is an anionic surfactant derived from lauryl alcohol (from coconut or palm oil). It is one of the oldest and most-studied cosmetic surfactants, prized for its powerful foaming and degreasing properties. Unlike SLES, it is not ethoxylated.

Documented risks

PEG-80 Sorbitan Laurate: PEG-80 sorbitan laurate is considered safe at cosmetic use levels. As an ethoxylated compound, there is potential for trace 1,4-dioxane and ethylene oxide contamination from manufacturing; FDA and EU regulations set acceptable limits and modern manufacturing minimizes these impurities. No carcinogenic or endocrine-disrupting effects at cosmetic concentrations are established. The CIR has assessed sorbitan esters and polysorbates as safe.

Sodium Lauryl Sulfate: SLS is safe at cosmetic use concentrations per the CIR Expert Panel. It is more irritating than SLES to skin and mucous membranes, particularly at concentrations above 2% with prolonged contact; this is why most rinse-off products keep it at 1–2% or opt for SLES. It can disrupt the skin barrier transiently, which is why some people with canker sores or eczema avoid SLS toothpastes and cleansers. It is not carcinogenic, not a hormone disruptor, and is not absorbed systemically in meaningful amounts. It biodegrades rapidly in the environment.