Does Kosas deodorant have PFAS?
Kosas deodorant averages 75 out of 100 on PFAS Authority's PFAS and toxin screen across the 7 Kosas deodorant products graded as of October 2026, level with the 75 out of 100 median for the 53 other deodorant brands graded alongside it.
Kosas deodorant averages Excellent on our four-band scale. 7 of the 7 we graded are worth buying. That is above 49% of the deodorant brands we grade.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
Kosas deodorant worth buying Good or better, best-graded first
- water-based serum and mineral deodorant base
- We found no PFAS statement from the brand
- Fragrance allergens / sensitizers in serum base. No specific fragrance allergen disclosures are available for…
3 hazards checked on this product, all on its full breakdown.
- water-based serum with AHA active ingredients
- We found no PFAS statement from the brand
- 1,4-dioxane contamination. Water-based emulsified cosmetics can harbor trace 1,4-dioxane as a byproduct of…
3 hazards checked on this product, all on its full breakdown.
- Liquid serum with AHA active ingredients, typical cosmetic base
- We found no PFAS statement from the brand
- 1,4-dioxane (preservative byproduct). Liquid cosmetics may contain trace 1,4-dioxane as a byproduct of…
3 hazards checked on this product, all on its full breakdown.
- aqueous cream serum and powder deodorant base
- We found no PFAS statement from the brand
- AHA irritation and skin barrier disruption. This product markets an AHA serum component (likely glycolic or…
- Deodorant base (presumed mineral/plant oil)
- We found no PFAS statement from the brand
- Fragrance allergens and essential oils. Kosas Chemistry lists essential oils and fragrance components (beachy…
2 hazards checked on this product, all on its full breakdown.
- aqueous serum base, AHA active, mineral/plant-derived ingredients
- We found no PFAS statement from the brand
- Formaldehyde / VOCs. Aqueous cosmetics require antimicrobial preservation. Kosas does not publicly detail its…
2 hazards checked on this product, all on its full breakdown.
- Standard cosmetic formulation (deodorant base)
- We found no PFAS statement from the brand
- Fragrance allergens and skin sensitization. Deodorants typically contain fragrance blends (parfum) that may…
3 hazards checked on this product, all on its full breakdown.
Better deodorant from other brands
Graded higher than the Kosas average of 75.
- mineral-based powder blend (arrowroot, magnesium hydroxide, mica)
- We found no PFAS statement from the brand
- Skin irritation from magnesium hydroxide alkalinity
- cosmetic formulations, primary ingredients listed
- A third party reports verifying it as PFAS-free
- Fragrance allergens (natural essential oils)
2 hazards checked on this product, all on its full breakdown.
- natural mineral powders, plant-based actives, beeswax
- We found no PFAS statement from the brand
- Beeswax purity and contamination
2 hazards checked on this product, all on its full breakdown.
The same question, asked of the other deodorant brands
Best average grade first. Kosas averages 75.
See every Kosas product we grade on the Kosas brand page, or the full deodorant ranking.