The Lab
Specimen No. 0020
AvoidSyntheticsurfactantemulsifier

DEA / TEA (Diethanolamine / Triethanolamine)

diethanolamine · dea · triethanolamine

Foam-boosting amines that can react with nitrites in formulas to form nitrosamines — probable carcinogens. EU restricts use.

high confidence
Researched April 18, 2026

Concerns

  • Can form carcinogenic nitrosamines when combined with nitrite contaminants
  • EU restricts DEA in cosmetics
  • Skin and respiratory irritant at higher concentrations
  • Possible hormone disruption

Regulatory flags

  • DEA banned in EU cosmetics — IARC Group 2B
  • California Prop 65 listed

Commonly found in

ShampooBody washFacial cleanserSunscreenHair dye

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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Safer swaps · Research references

Based Bodyworks

BASED Body Wash

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.

Coco glucosideAloe veraGlycerinTea tree
View product

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LabelCleared verdict badge: DEA / TEA (Diethanolamine / Triethanolamine) — Avoid
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