Is Kosas PFAS-free?
Across 16 graded products, Kosas averages F (60/100). On disclosure, the brand says nothing publicly about PFAS. 9 of its products grade C or better. Grades are model-based estimates, not lab results.
Worth buying from Kosas C or better, safest first
Kosas
Soulgazer Lengthening Mascara + Lash Serum in 1 for Sensitive Eyes | Hypnotize - black
liquid mascara and serum formulation, typical pigments and polymers
Lower-concern typical mascara; no known PFAS red flags, but brand offers no transparency.
⚠Risky category by default
Kosas
Chemistry AHA Serum Kosas Deodorant
water-based serum and mineral deodorant base
Lower concern for PFAS; typical cosmetic formulation with no flagged additives, but brand makes no PFAS commitment.
⚠Risky category by default
Kosas
Chemistry Deodorant (Beachy Clean)
Deodorant base (presumed mineral/plant oil)
Lower PFAS concern typical of solid deodorants, but brand silence limits assurance.
⚠Risky category by default
Kosas
Дезодорант Chemistry Aha
Standard cosmetic formulation (deodorant base)
Lower concern; typical deodorant without known PFAS drivers, but brand offers no transparency.
⚠Risky category by default
Kosas
Kosa Ayurveda - Pitta Probiotic Deodorant
Mineral powder, plant-based ingredients, baking soda, arrowroot
Lower concern; no PFAS risk profile typical for powder deodorants, but brand makes no explicit statement.
⚠Risky category by default
Kosas
Chemistry Deodorant - Aluminium and Baking Soda Free + BO-Fighting AHA Serum that Exfoliates Softens and Nourishes the Skin (Fragrance Free)
aqueous cream serum and powder deodorant base
Lower concern; liquid/powder cosmetic with no PFAS-prone coatings, but brand makes no explicit safety claim.
⚠Risky category by default
Kosas
Kosa Ayurveda - Vata Probiotic Deodorant
Mineral powder, natural gum base, essential oils, probiotics
Lower concern; probiotic powder deodorant formulation has no typical PFAS vectors.
⚠Risky category by default
Kosas
Kose - Desodorante Stick Deo Carat
Stick deodorant base (typically waxes, oils, starch)
Lower concern for a stick deodorant, but no public PFAS disclosure from Kose/Kosas.
⚠Risky category by default
Kosas
Little Seed Farm Deodorant Cream
cream base (oils, butters, waxes)
Lower PFAS concern for a cream deodorant with no waterproofing claims, but verify if you want explicit assurance.
⚠Risky category by default
Graded and flagged D and F, we’d swap these
Kosas
The Big Clean Volumizing + Lash Care Mascara Mini
pigments, polymers, waxes (typical mascara base)
Insufficient transparency; mascara waterproofing agents merit clarification from the brand.
⚠Risky category by default
Kosas
Makeup | Soulgazer Lengthening Mascara + Lash Serum In 1 For Sensitive Eyes | Color: Black/Red | Size: Os | Pm-32083440's Closet
mascara + lash serum blend (typical: waxes, oils, pigments, polymers)
Skip until Kosas clarifies PFAS ingredient policy or seek third-party testing.
⚠Risky category by default
Kosas
Soulgazer Lengthening Mascara
proprietary film-forming resin blend with waterproofing
Waterproof mascaras often contain PFAS-based water-resistant polymers; Kosas does not disclose composition, skip if PFAS-sensitive.
⚠Waterproof or stain-proof treatment
Kosas
Soulgazer Mascara Intense Black In Transparent
Waterproof mascara formula (likely silicone-based polymers)
Waterproof mascara carries inherent PFAS risk; Kosas silent on disclosure, caution warranted.
⚠Waterproof or stain-proof treatment
Kosas
Kose Fasio Ultra Waterproof Mascara Curl
polymer film/resin coating on fibers (waterproof mascara base)
Waterproof cosmetics carry inherent PFAS risk; Kosé makes no disclosure, skip if PFAS-sensitive.
⚠Waterproof or stain-proof treatment
Kosas
The Big Clean Mascara Longwear Fluffy Lashes, Intense Black
waterproof liquid mascara formula (polymers/film-formers unspecified)
Waterproof mascara carries inherent PFAS concern; Kosas silent on composition, proceed with caution.
⚠Waterproof or stain-proof treatment
Kosas
Soulgazer Lengthening + Lifting Peptide Mascara – Smudge-proof,
Peptide complex with smudge-proof (likely silicone or wax-based) waterproof binder
Skip until brand discloses or third-party tests; waterproof cosmetics often contain PFAS but Kosas provides no transparency.
⚠Waterproof or stain-proof treatment
Every grade uses the same public rubric. How grades work →