Are anionic surfactants bad for my skin?

Anionic surfactants are effective cleansers but can sometimes be drying or irritating, especially for sensitive skin types. The impact depends on the specific surfactant, its concentration, and the overall product formulation.

What is the difference between SLS and SLES?

Sodium Lauryl Sulfate (SLS) is a stronger anionic surfactant and can be more irritating. Sodium Laureth Sulfate (SLES) is a milder version that has been ethoxylated, which reduces its potential for irritation while maintaining good cleansing properties.

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Anionic Surfactants

Anionic surfactants are a class of cleansing agents that create lather and remove dirt and oil. They are effective at cleaning but can sometimes be more stripping than other surfactant types. Common examples include Sodium Lauryl Sulfate (SLS) and Sodium Laureth Sulfate (SLES).

NoneCleansing agentEvidence: High

BenefitMinimal 0.8 / 4

RiskModerate 1.5 / 4

Irritation i1.8 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Sensitization i1.2 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Systemic exposure i0.1 / 4

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

Effective cleansing
Good lathering

Things to watch

Can be drying
Potential for irritation

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Frequently asked questions

Are anionic surfactants bad for my skin?: Anionic surfactants are effective cleansers but can sometimes be drying or irritating, especially for sensitive skin types. The impact depends on the specific surfactant, its concentration, and the overall product formulation.
What is the difference between SLS and SLES?: Sodium Lauryl Sulfate (SLS) is a stronger anionic surfactant and can be more irritating. Sodium Laureth Sulfate (SLES) is a milder version that has been ethoxylated, which reduces its potential for irritation while maintaining good cleansing properties.