Ingredient
Sodium Laureth Sulfate (SLES)
What is Sodium Laureth Sulfate (SLES)?
Sodium Laureth Sulfate (SLES) is a surfactant and detergent commonly found in personal care products. It is derived from ethoxylated lauryl alcohol and is often used in products where effective cleansing and foaming are desired.
SLES is used for its ability to produce a rich lather, which improves the sensory experience of shampoos and body washes. While it effectively removes dirt and oils, some research and anecdotal reports suggest it can cause skin irritation in certain individuals, particularly with prolonged use or in higher concentrations.
When you see Sodium Laureth Sulfate on a label, it's worth checking the order in the ingredient list, as this indicates its concentration relative to other ingredients. Those with sensitive skin might prefer to use products without SLES or opt for milder alternatives.
Commonly found in: Shampoos, Body Washes, Facial Cleansers, Toothpastes, Hand Soaps
What to watch
- May cause skin and eye irritation, especially in high concentrations.
- Reports of it potentially causing allergic reactions in some individuals with sensitive skin.
Benefits
- Effective cleaning and foaming properties.
Sodium Laureth Sulfate is generally recognized as safe for use in cosmetics by the FDA.
Research indicates effectiveness as a cleanser, but acknowledges potential for skin irritation in some people.
Sodium Laureth Sulfate is typically not derived from animal sources and is considered vegan-friendly.
Sources: Safety Assessment of Sodium Laureth Sulfate and Related Compounds as Used in Cosmetics
Scout's take
Ethoxylated sulfate cleanser; strips the scalp barrier and carries documented 1,4-dioxane (IARC Group 2B probable human carcinogen) contamination risk from the ethoxylation manufacturing step. EWG 3-6.
More from Scout's analyses
Ethoxylated sulfate cleanser as a top-5 ingredient. Carries documented 1,4-dioxane (IARC Group 2B probable human carcinogen) contamination risk. The 'pH-balanced / sensitive skin' marketing claim is hard to reconcile with this primary surfactant choice. EWG 3-6.
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