Kerastase Resistance Bain Force Architecte Shampoo
Low-medium concern; rinse-off shampoo has no known PFAS triggers but lacks transparency.
This water-based shampoo has no water-repellent, stain-resistant, or non-stick claims that would require PFAS coatings. No public lab data or brand PFAS disclosure exists, though the product type inherently carries lower risk than waterproof goods.
We flunk more products than we pass. This one earned its grade. How we grade
Material
aqueous liquid shampoo (surfactants, water, conditioning agents)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Kerastase Resistance Bain Force Shampoo is made of, ingredients and materials
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.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
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.
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.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Heavy metals
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.
Source, FDA ↗Formaldehyde / VOCs
No documented evidence that this shampoo contains formaldehyde donors (e.g., quaternium-15) or formaldehyde itself. Modern shampoos typically use preservatives with lower concern profiles, and Kerastase does not list such agents in available ingredient disclosures.
Source, ATSDR ↗How is this PFAS grade calculated?
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.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Kerastase has made none
Formulations change between production runs, so check the current label. How we grade.
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.