PresiDent · Dental Floss
GuruNanda Expandable Dental Floss – Peppermint Waxed
Lower concern; typical dental floss with no known PFAS-linked features, but no public PFAS statement from brand.
Dental floss is not a category historically associated with PFAS contamination. GuruNanda's peppermint waxed floss uses nylon and wax, standard materials unlikely to require Teflon-family coating coatings.
Shop PresiDent on Amazon →Material
Nylon floss with wax coating (peppermint-flavored)
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
GuruNanda Expandable Dental Floss is nylon-based with a wax coating (peppermint-flavored). Nylon is a synthetic polymer that does not leach problematic chemicals during brief oral contact, and dental-grade wax (typically beeswax, carnauba, or paraffin blends) is food-safe and designed for intraoral use. The "expandable" feature means the floss strands widen on contact with teeth, which is a mechanical property with no known safety implications. Peppermint flavoring in dental products is cosmetic and not a toxicological concern at typical trace amounts.
The brand's record and disclosure
PresiDent (the parent brand) maintains a largely silent public stance on chemical safety disclosures and PFAS statements. No major product recalls or established safety controversies are on record for this floss product. The brand does not appear to publish ingredient certifications, third-party testing, or detailed chemical transparency statements. For a commodity dental care item, this level of disclosure is unremarkable but also not reassuring compared to brands that voluntarily test or certify.
How it compares in its category
Nylon floss with wax coating is the industry standard for dental floss and carries no greater inherent risk than unflavored alternatives. Expandable nylon floss is a common variant; the engineering adds convenience without introducing new hazard classes. Waxed floss overall has a longer safety track record than unwaxed or tape variants, as the wax layer prevents fraying and is inert in the oral cavity. This product sits squarely in the mainstream mid-market category with no distinguishing safety features or red flags.
If you buy it
Use as directed: unwind a short length (12-18 inches) and floss daily without forcing between teeth, as this can irritate gums regardless of floss type. Do not swallow large amounts of floss; small amounts occasionally ingested pose no known risk, but floss is not meant to be chewed or swallowed routinely. Replace the container if it dries out or the wax coating becomes sticky or discolored (typically 6-12 months of regular use). Store in a cool, dry place; wax can soften in heat but will not degrade into hazardous byproducts.
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.”
Ingestion of floss material
Nylon floss is not digestible but is not toxic if accidentally swallowed in small amounts. Choking is a mechanical risk, not a chemical hazard, and is minimized by normal adult use.
Wax coating degradation or leaching
Dental-grade wax coatings (beeswax, carnauba, or paraffin) do not hydrolyze or leach harmful compounds during normal oral contact. No established data linking floss wax to chemical exposure.
Peppermint flavoring allergen risk
Peppermint flavoring is generally safe but may trigger allergic reactions or oral irritation in individuals with menthol sensitivity or mint allergies. Contact dermatitis of the gums is rare but documented in sensitive individuals.
Nylon microparticle shedding
Nylon fibers in floss do not shed microparticles during normal use; the material is engineered to remain intact. No evidence of microplastic release from dental floss during flossing.
Formaldehyde or dye residues in coating
Dental-grade wax and nylon floss do not typically contain formaldehyde resins or azo dyes used in textiles or coatings. No public recalls or findings for this product or product class.
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 Dental Floss
Cocofloss
Refill Trio
Coconut fiber, based floss with plant-based coating
Lower-concern dental product; natural materials and transparent PFAS stance, but no independent verification.
⚠Risky category by default
Dental Lace
Refillable Silk Dental Floss
Silk floss with compostable refillable packaging
Lower concern; silk floss with credible PFAS-free positioning and third-party certification.
✓Verified PFAS-free by a third party
Dental Lace
Plant Based/Vegan Floss Refillable Glass Container PFAS-Free (2 Spools/4-
Plant-based vegan floss (likely plant cellulose or silk fibers)
Lower-concern product with explicit PFAS-free claim; no third-party verification limits certainty.
⚠Risky category by default
More dental floss 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.