Leonardo TrasandeMD, MPP · pediatrician and environmental epidemiologist, NYU
Yes, at population scale, and the damage can be counted in cases, deaths and dollars.
What it rests onExpert-panel probability of causation adapted from IPCC language and WHO GRADE criteria, applied to biomonitoring and epidemiological data, with Monte Carlo uncertainty intervals.
Source: pubmed.ncbi.nlm.nih.gov ↗
Joe SchwarczPhD · chemist, director of the McGill Office for Science and Society
The doses people actually encounter are minute and the alarm is out of proportion to any risk that exists.
What it rests onDose comparison and the absence of human outcome data; he accepts that phthalates and bisphenol A are endocrine disruptors active at very low levels but holds that the risk, if any, would be minor relative to others we accept.
Source: mcgill.ca ↗
Trasande's strongest effect estimates are in pregnancy, fetal development and early childhood, plus cardiovascular mortality in adults aged 55 to 64. Schwarcz is answering for a general adult drinking bottled water. They are largely not describing the same person, and a general adult user is closer to Schwarcz's population than to Trasande's.
Both accept that phthalates and bisphenol A interfere with hormone signalling at very low concentrations, and both accept that human outcome evidence is thinner than laboratory and animal evidence. Schwarcz states the first explicitly.
Prospective human cohorts with measured exposures and hard endpoints; independent replication of the NHANES mortality association outside NHANES; independent re-analysis of the attributable-fraction models. Trasande's own 2026 preterm birth paper already publishes a sensitivity range four to ten times lower than its headline figure, which is the kind of number that would move this.
You do, and your call is dated, kept, and yours to change. Follow the people you already trust and what they publish turns into a short daily practice.
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