Aunt Flow · Tampons
Aunt Flow Period Care
Lower concern, period care made from absorbent plant fibers typically avoids PFAS, but brand provides no transparency.
Aunt Flow period products are primarily cotton and rayon-based, materials not commonly treated with PFAS. However, the brand does not publicly disclose materials, manufacturing practices, or any PFAS testing; this silence makes full confidence impossible.
Shop Aunt Flow on Amazon →Material
organic cotton, rayon, naturally absorbent fibers
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
period care 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
Aunt Flow tampons are constructed from organic cotton and rayon, both plant-derived absorbent fibers that avoid synthetic polymers and their associated leaching risks. Organic cotton certification means the crop was grown without synthetic pesticides or GMOs, reducing residual chemical contamination in the finished product. Rayon is a regenerated cellulose fiber; while its production uses caustic chemicals, the final fiber itself is chemically inert and poses no acute toxicity risk during use. The absence of plastic applicators or synthetic superabsorbents (common in conventional tampons) eliminates exposure to plasticizers, adhesives, and chlorine-based bleaching byproducts.
The brand's record and disclosure
Aunt Flow has been transparent about ingredient sourcing and holds organic certifications for its cotton line, which is a positive indicator of supply-chain scrutiny. The brand has not faced major recalls or safety controversies in public records as of the last documented evidence. However, the brand does not publicly disclose full third-party testing results for heavy metals, dioxins, or other contaminants, a gap shared by most period-care manufacturers but worth noting for those seeking maximum transparency. Their PFAS stance remains undisclosed, though plant-fiber tampons are inherently lower-risk for PFAS than those treated with water-repellent coatings or synthetic polymers.
How it compares in its category
Organic cotton tampons sit at the safer end of the menstrual-care spectrum; conventional tampons often use bleached rayon blends, chlorine processing byproducts, and undisclosed adhesive residues. Aunt Flow's rayon-cotton blend is comparable to competitors like Seventh Generation and Cora in material safety profile, though Cora explicitly publishes third-party testing. Plastic-applicator tampons and those with added fragrance or antimicrobial treatments introduce additional chemical exposures that Aunt Flow avoids. Period cups and reusable cloth pads eliminate single-use chemical exposure entirely, though they carry different hygiene and maintenance considerations.
If you buy it
Aunt Flow tampons require no special handling or temperature limits, use and dispose as directed on packaging. Store in a cool, dry place away from moisture to prevent mold; cardboard applicators degrade faster than plastic if wet. Discontinue use immediately if you notice chemical odors, discoloration, or irritation, as these may signal improper storage or manufacturing variance. If you have a history of toxic shock syndrome (TSS) or severe vulvovaginal sensitivity, discuss this product with a healthcare provider, though risk is not elevated compared to other tampons.
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.”
Pesticide residues in cotton (conventional)
Aunt Flow markets organic cotton, which avoids synthetic pesticide application by standard. No residue testing is publicly disclosed, but organic certification itself serves as third-party verification of pesticide-free cultivation.
Dioxins and furans from chlorine bleaching
Rayon in tampons is often chlorine-bleached during processing; however, final products contain trace or undetectable dioxin levels according to FDA guidance. Aunt Flow does not disclose bleaching method or post-process testing, leaving this hazard unconfirmed but in line with industry standards.
Heavy metals (lead, cadmium) in rayon or cotton
Plant fibers used in tampons are not known vectors for heavy-metal accumulation. No recalls or contamination reports exist for Aunt Flow or peer brands on this hazard class.
Fragrance allergens or synthetic additives
Aunt Flow does not market scented or antimicrobial tampons. The unscented organic cotton line carries no documented fragrance sensitizer risk.
Toxic shock syndrome (TSS) risk
TSS risk is not eliminated by material composition alone, it correlates with prolonged tampon use and bacterial colonization. Aunt Flow tampons carry the same TSS advisory as all tampon products and should be changed every 4-8 hours per FDA guidance.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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 Tampons
Seventh Generation
Organic Cotton Tampons Applicator
organic cotton (tampon & applicator core); cardboard applicator
Lower-concern buy, organic cotton & MADE SAFE cert reduce PFAS risk, though brand is silent on the topic.
✓Verified PFAS-free by a third party
Lola
Organic Cotton Tampons
organic cotton (no synthetic coatings)
Lower concern, uncoated organic cotton with transparent PFAS-free positioning and third-party certification.
✓Verified PFAS-free by a third party
Cora
Organic Tampons with Applicator
organic cotton tampon with cardboard/plastic applicator
Lower-concern choice; organic base material and MADE SAFE cert suggest thoughtful sourcing, but no explicit PFAS commitment.
✓Verified PFAS-free by a third party
More tampons 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.