Does Crest dental floss have PFAS?
Crest dental floss averages 75 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 Crest dental floss products graded as of October 2026, level with the 75 out of 100 median for the 21 other dental floss brands graded alongside it.
Crest dental floss averages Excellent on our four-band scale. 4 of the 4 we graded are worth buying. That is above 48% of the dental floss 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.
What Crest says and does about PFAS
We found no PFAS statement from Crest or its owner Procter & Gamble on its toothpaste. The only independent PFAS evidence we found naming Crest is a 2019 screening that flagged Crest Glide Deep Clean Cool Mint Floss for organic fluorine, and a P&G spokesperson said the safety of its floss stands. We found no test, lawsuit or agency action naming Crest toothpaste for PFAS.
- Independent testA study reported by BuzzFeed News screened floss for fluorine and flagged Crest Glide Deep Clean Cool Mint Floss among several brands. Fluorine screening is an indicator, not proof of specific PFAS. BuzzFeed News ↗
- Brand statementA Procter & Gamble spokesperson, whose company owns Crest, responded to the floss findings by saying it stands by the safety of its products. BuzzFeed News ↗
Sources checked September 29, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.
Crest dental floss worth buying Good or better, best-graded first
- Polyester or nylon floss threader, no identified coating
- Microplastics. Single-use polyester or nylon threaders may shed microscopic fibers during extended use or if…
- polyester/nylon filament floss, no disclosed coating
- Teflon-family coating/Teflon-type coating (undisclosed). Crest does not publicly state whether polyester or…
2 hazards checked on this product, all on its full breakdown.
- Nylon floss filament
- Fragrance allergens. Mint flavoring is added but Crest does not disclose whether natural or synthetic…
- nylon floss filament
- Fragrance allergens (mint flavoring). Mint flavoring in oral care can trigger contact sensitivity or allergic…
2 hazards checked on this product, all on its full breakdown.
Better dental floss from other brands
Graded higher than the Crest average of 75.
- Plant-based waxed fiber floss
- A third party reports verifying it as PFAS-free
- Fragrance allergens and sensitizers
- nylon monofilament
- The brand calls it PFAS-free, which we have not verified
- Microplastics
2 hazards checked on this product, all on its full breakdown.
- Coconut fiber-based floss
- The brand calls it PFAS-free, which we have not verified
- Microbial growth in natural fiber storage
The same question, asked of the other dental floss brands
Best average grade first. Crest averages 75.
See every Crest product we grade on the Crest brand page, or the full dental floss ranking.