Kerastase · Shampoo
Kerastase Resistance Bain Force Architecte Shampoo
Lower concern, typical rinse-off shampoo with no known PFAS triggers, but brand offers no transparency.
Kerastase Resistance Bain Force Architecte is a water-based shampoo without water-repellent, stain-resistant, or non-stick claims that would require PFAS coatings. No public lab data or brand PFAS disclosure exists.
Shop Kerastase on Amazon →Material
aqueous liquid shampoo (surfactants, water, conditioning agents)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Kerastase Resistance Bain Force Architecte is an aqueous liquid shampoo built on standard surfactant chemistry, primarily anionic detergents, water, and conditioning polymers designed to cleanse and strengthen weakened hair. The formula includes silicones and keratin-derived conditioning agents typical of professional-grade shampoos. As a rinse-off product, exposure is brief and most ingredients wash away; the main concern would be residual buildup from repeated use or ingredients that accumulate in hair rather than skin.
The brand's record and disclosure
Kerastase (L'Oreal subsidiary) does not publicly disclose full ingredient safety testing or supply-chain verification for heavy metals or contaminants in this product line. The brand has not faced major product recalls or documented safety controversies specific to this shampoo. L'Oreal complies with EU and US cosmetic regulations but does not voluntarily publish third-party safety certifications or detailed impurity limits for this product.
How it compares in its category
This shampoo sits in the mid-to-premium professional category; formulation and hazard profile are typical for that tier. Many competitors (e.g., Olaplex, SheaMoisture) market transparency and third-party testing more prominently, whereas Kerastase relies on brand reputation. Sulfate-free formulas are increasingly standard; this product is sulfate-free, which is consistent with current category best practice and reduces irritation risk.
If you buy it
Use as directed on damp hair; rinse thoroughly to avoid buildup. If scalp irritation occurs, discontinue and consult a dermatologist. Store in a cool, dry place and replace every 6-12 months or when efficacy declines. This shampoo is not ingested and is not heated, so thermal decomposition hazards do not apply. Patch test if you have sensitive skin or known fragrance allergies.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Fragrance allergens and undisclosed scent components
Kerastase lists 'fragrance' as a blend ingredient but does not itemize components. Common fragrance allergens (limonene, linalool, eugenol) may be present and can trigger contact dermatitis or scalp sensitivity in susceptible individuals; disclosure is limited.
Heavy metals in colorant or mineral additives
No recalls or public testing results for lead, cadmium, or other heavy metals in this shampoo are on record. Rinse-off products carry lower dermal absorption risk than leave-on cosmetics, and Kerastase formulations do not typically include mineral pigments that concentrate heavy metals.
1,4-dioxane contamination in surfactant supply
Anionic surfactants used in shampoos may be contaminated with 1,4-dioxane as a manufacturing byproduct. Kerastase does not publicly disclose testing for this; it is a known impurity in cosmetics but typically present at low levels that do not pose acute risk during rinse-off use.
Hair and scalp irritation from conditioning buildup
Silicone and polymer conditioners in this formula can accumulate on hair shaft and scalp with repeated use if not fully rinsed. Over time, buildup may trigger itching, flaking, or reduced lather in some users; this is a use-dependent risk, not a toxicological hazard.
Formaldehyde-releasing preservatives
No documented evidence that this shampoo contains formaldehyde donors (e.g., quaternium-15) or formaldehyde itself. Modern shampoos typically use safer preservatives, and Kerastase does not list such agents in available ingredient disclosures.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
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More shampoo grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.