Does Sodium Lauryl Sulfate (SLS) Cause Hyperpigmentation?

Evidence-based guidance on sodium lauryl sulfate (sls) and its risk of triggering or worsening dark spots, melasma, and post-inflammatory hyperpigmentation.

Risk level

MODERATE risk

SLS is a strong surfactant that can irritate and disrupt the skin barrier, especially in leave-on or high-frequency wash-off products. Barrier damage increases PIH risk.

How it can affect pigmentation

Surfactant irritation and barrier disruption
Protein and lipid denaturation
Post-inflammatory hyperpigmentation from chronic irritation

Usage advice

SLS in rinse-off cleansers is acceptable for many people, but those with sensitive or pigmentation-prone skin may do better with gentler sulfate-free cleansers.

Recommendations

Choose sulfate-free cleansers if you notice dryness or stinging.
Rinse thoroughly and moisturize after cleansing.
Always use sun protection if your skin tends to hyperpigment; we recommend a zinc oxide sunscreen.

Sources

Surfactants and skin irritation. Ananthapadmanabhan KP, et al. Dermatol Ther. 2004;17 Suppl 1:16-25. link

Related ingredients

Alcohol Denat / Denatured Alcohol Benzoyl Peroxide

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