U by Kotex Review, Is U by Kotex Non-Toxic?
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.
Across 5 graded products, U by Kotex averages Good (70/100). On disclosure, the brand says nothing publicly about PFAS. 5 of its products grade Good or better. Grades are model-based estimates, not lab results.
Worth buying from U by Kotex Good or better, safest first
U by Kotex
Compact Super Unscented Tampons, 16 tampons
rayon/viscose absorbent core, cotton blend applicator
Bleach residues (chlorine/dioxins)
Rayon and cotton in tampons are typically bleached during manufacturing; while modern…
Pesticide residue
Applicator uses cotton blend; unless certified organic, conventional cotton may retain…
Toxic shock syndrome (TSS) risk
TSS is associated with all tampons, particularly high-absorbency variants, due to…
Lower concern; traditional tampon materials inherently avoid PFAS.
⚠Risky category by default
U by Kotex
Click Compact Multipack Tampons Regular/Super Unscented 30 ct
Rayon/viscose, cotton, cardboard applicator
Toxic shock syndrome (TSS) - general tampon risk
TSS is associated with prolonged tampon use and high-absorbency products, not specific…
Lower concern product, no confirmed PFAS risk signals identified.
⚠Risky category by default
U by Kotex
compact regular unscented tampons, 32 tampons
rayon/viscose core, cotton/synthetic blend
Skin irritation or allergic contact dermatitis from materials
Rayon/cotton blends are low-irritancy materials, but individual sensitivity to synthetic…
Toxic shock syndrome (TSS) from prolonged wear
TSS is a known rare but serious risk associated with all tampons, including conventional…
Applicator degradation and microplastic shedding
Synthetic blend applicators can degrade with friction or moisture exposure. No…
Lower concern. Core materials inherently low-risk, brand silent on PFAS.
⚠Risky category by default
U by Kotex
Click Compact Tampons
rayon/viscose and cardboard applicator
Dioxin and bleaching byproducts in rayon fibers
Rayon production involves bleaching steps that can leave trace dioxin residues…
Bacterial or mold growth during storage or use
Cardboard packaging can absorb moisture in humid environments, creating conditions for…
Fragrance or additive allergens
Kotex Click line includes scented variants; undisclosed fragrance compounds can trigger…
Cardboard applicator splinter or irritation risk
Cardboard applicators are generally safe but can splinter or tear if compressed…
Lower concern, but brand provides no PFAS transparency.
⚠Risky category by default
U by Kotex
Premium Security Tampons, Regular
rayon/cotton core, plastic applicator
Toxic shock syndrome (TSS) from any tampon
TSS is rare but documented across all tampon types and brands when worn beyond…
Fragrance allergens (if scented variant)
The Regular variant does not list fragrance; however, scented Kotex variants exist.…
Lower concern. Minimal PFAS risk; no waterproofing claims present.
⚠Risky category by default
Every grade uses the same public rubric. How grades work →