The Lab
Specimen No. 0005
CautionSyntheticsurfactant

Sodium Laureth Sulfate (SLES)

sles · sodium laureth sulfate · sodium lauryl ether sulfate

Milder than SLS but can be contaminated with 1,4-dioxane (a probable carcinogen) during manufacturing.

high confidence
Researched April 18, 2026

Concerns

  • 1,4-dioxane contamination — probable carcinogen (EPA Group B2)
  • Skin irritation at high concentrations
  • Environmental persistence

Regulatory flags

  • Ethoxylation may introduce 1,4-dioxane (IARC Group 2B) as impurity

Commonly found in

ShampooBody washBubble bathHand soap

Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.

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Branch Basics

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One bottle replaces your entire cleaning cabinet.

Why it's cleaner

No flagged ingredients in our current review; key ingredients include Coco glucoside, Decyl glucoside, Chamomile extract.

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90/100

Sulfate-free, fragrance-free body wash with no hormone-disrupting ingredients.

Why it's cleaner

No flagged ingredients in our current review; key ingredients include Coco glucoside, Aloe vera, Glycerin.

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