The Landmark 2024 Study: Ragusa et al.

The scientific foundation for the Tampax lead lawsuit is a peer-reviewed study published in the journal Environment International in July 2024. Conducted by researchers including Dr. Ania Baroni and colleagues, the study — formally titled "Tampons as a source of exposure to toxic metals and organic fluorine in menstruating women" — tested 14 tampon brands sold in the United States and European Union.

Key methodology: Researchers used inductively coupled plasma mass spectrometry (ICP-MS), a highly sensitive analytical technique, to detect trace heavy metals. ICP-MS can identify metal concentrations at the parts-per-billion (ppb) and parts-per-trillion (ppt) level. This is the same methodology used by regulatory agencies including the EPA and FDA for water and food safety testing.

What the Testing Found: Heavy Metals in Tampax

All 14 tampon brands tested contained at least one detectable heavy metal. For Tampax-branded products specifically, the study found:

  • Lead (Pb) — detected in Tampax Pearl and other lines. The study's findings, when extrapolated to repeated daily use, suggest cumulative exposure that may exceed EPA and California Prop 65 thresholds for lead as a reproductive toxicant
  • Arsenic (As) — a Group 1 human carcinogen per the International Agency for Research on Cancer (IARC), detected in multiple tampon brands
  • Cadmium (Cd) — a nephrotoxin (kidney toxin) that accumulates in body tissue, detected at trace levels
  • Mercury (Hg) — detected at trace levels in some samples
  • Organic fluorine (PFAS marker) — detected in both conventional and organic tampon products, indicating PFAS contamination

How Tampax Lead Levels Compare to Federal Standards

Context is critical for interpreting these findings. Here is how the measured concentrations compare to relevant regulatory benchmarks:

EPA Drinking Water Standards

  • EPA Maximum Contaminant Level Goal (MCLG) for lead in water: 0 ppb (no safe level)
  • EPA Lead Action Level: 15 ppb
  • Lead found in some Tampax Pearl samples: up to approximately 600 ppb (as alleged in litigation)
  • Ratio: Approximately 40x higher than EPA's action level

California Proposition 65

  • California Maximum Allowable Dose Level (MADL) for lead as a reproductive toxicant: 0.5 μg/day
  • Estimated daily absorption through vaginal mucosa based on tampon use patterns and measured concentrations: potentially exceeds MADL for regular users

FDA Standards for Feminine Hygiene Products

Here is the regulatory gap at the center of this controversy: the FDA does not currently require tampon manufacturers to test for heavy metal content or disclose results. Tampons are regulated as Class II medical devices, but the FDA's existing requirements focus on absorbency labeling and infection risk (Toxic Shock Syndrome), not contamination from raw materials.

Independent Testing Outside the Ragusa Study

Following the 2024 publication, several consumer advocacy organizations and independent laboratories conducted their own testing:

  • Consumer Reports conducted separate testing confirming heavy metal detection in multiple tampon brands
  • The Environmental Working Group (EWG) published a report on PFAS in feminine care products
  • Testing commissioned by plaintiff law firms in connection with the class action litigation

Do Arsenic and Cadmium Pose Risks Too?

While lead has received the most attention, the co-presence of arsenic and cadmium in Tampax products raises additional concerns:

  • Arsenic: No safe level; classified as a Group 1 carcinogen. Long-term exposure is associated with bladder, lung, and skin cancer
  • Cadmium: Accumulates in the kidneys over decades; associated with kidney disease, bone density loss, and lung cancer in occupational exposure settings

The combination of multiple heavy metals — even at individually sub-threshold levels — is concerning because of potential synergistic toxicity effects that regulatory limits for individual substances do not account for.

FDA Review Status

Following the 2024 research publication and subsequent media coverage, the FDA announced it would review its regulatory framework for heavy metals in menstrual products. As of May 2026, no new regulations or testing requirements have been finalized. Congressional hearings on the topic were held in early 2025.

Sources

  • Ragusa et al. (2024). Environment International. DOI: 10.1016/j.envint.2024.108817
  • EPA Maximum Contaminant Level Goals: 40 CFR Part 141
  • IARC Monographs on arsenic, metals, fibres, and dusts (Volume 100C)
  • California OEHHA Proposition 65 No Significant Risk Levels and MADLs