Kerastase · Shampoo
Kérastase Gloss Absolu Bain Hydra Glaze Shampoo
Lower concern for typical PFAS risk; no known aqueous shampoo chemistry requires fluorochemicals.
This is a rinse-off aqueous hair shampoo with no inherent product function that typically requires PFAS (no waterproofing, nonstick, or stain resistance needed). Kerastase does not claim PFAS-free status, and no independent lab data is publicly available.
Shop Kerastase on Amazon →Material
aqueous surfactant-based shampoo formulation
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
Gloss Absolu Bain Hydra Glaze is a water-based shampoo containing anionic surfactants (cleansing agents), humectants (glycerin-type moisture retentants), and conditioning polymers typical of premium hair care. The formulation is designed to coat and seal the hair cuticle with hydrating agents rather than strip it. No unusual chemical classes requiring high-hazard scrutiny appear in the standard ingredient deck for this product line.
The brand's record and disclosure
Kerastase (L'Oreal subsidiary) does not prominently advertise PFAS-avoidance commitments, but aqueous shampoos are not a vector for fluorochemical use in mainstream formulations. The brand maintains standard cosmetic ingredient transparency via product labels and SDS availability. No major safety recalls or disclosed contamination events specific to this product line are on public record.
How it compares in its category
This product sits in the premium shampoo segment with formulation complexity similar to salon-grade competitors (Moroccanoil, Olaplex, SheaMoisture). Water-based shampoos across this price tier carry equivalent low baseline hazard profiles; differentiation is primarily sensory and marketing rather than safety-driven. No material safety advantage or disadvantage versus alternatives at this price point.
If you buy it
Use as directed on damp hair; rinse thoroughly to avoid scalp residue buildup. Store in a cool, dry place away from direct sunlight to preserve thickening polymers and fragrance stability. Replace every 6-12 months depending on use frequency. If scalp irritation develops, discontinue and patch-test with a single application on a small area before resuming full use.
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 sensitizers
Kerastase shampoos contain fragrance compounds; individual sensitivity varies widely. No specific fragrance allergen concentration data is publicly disclosed for this formulation, so risk depends on personal skin reactivity rather than formulation defect.
1,4-dioxane (solvent/surfactant byproduct)
Aqueous shampoo chemistry can generate trace 1,4-dioxane during manufacturing if anionic surfactants are ethoxylated without purification steps. No established 1,4-dioxane contamination has been reported for Kerastase products; this hazard is primarily a category-level concern for shampoos generally, not this product specifically.
Formaldehyde releasers in preservative systems
Modern premium shampoos typically use gentler preservatives (phenoxyethanol, methylisothiazolinone) rather than formaldehyde-releasing agents. No evidence of formaldehyde releasers in this product's documented ingredient profile or brand controversy history.
Heavy metals in pigments or colorants
Gloss Absolu formulations are clear or light amber liquids with no disclosed synthetic colorants requiring heavy metal testing. Pigment contamination is not a documented concern for this product line.
Scalp irritation from sulfate surfactants
Kerastase premium shampoos typically use sulfate-free or mild surfactant blends to differentiate from mass-market products, but exact anionic surfactant composition is proprietary. Mild irritation is possible with sensitive scalps but is a user-specific reaction rather than a formulation defect.
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.
Safer alternatives in Shampoo
Credo Beauty
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salt crystals, mineral-based scrub
Lower-concern buy, salt scrub formulation carries minimal inherent PFAS risk.
✓Verified PFAS-free by a third party
Puracy
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aqueous surfactant-based liquid shampoo
Lower-concern shampoo refill; Puracy's MADE SAFE cert and no-PFAS positioning align, but cosmetic formulation labs are rarely published.
✓Verified PFAS-free by a third party
Puracy
Natural Baby Shampoo Body Wash
water-based surfactants, plant-derived ingredients, aqueous solution
Lower PFAS concern, liquid cosmetic with no water-resistant or nonstick triggers.
⚠Risky category by default
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.