GROK confirms this report.
The post accurately cites these numbers and the paradox explanation.Yes, the core factual claims in the post are accurate, based on a real 2023 study from UK Biobank data analyzed by McGill University researchers (published in Cancer Epidemiology, Biomarkers & Prevention).mcgill.caKey Verified Details
Cohort size: The analysis used UK Biobank data with ~472,672 participants (including ~17k BCC, ~2.3k cSCC, ~1.2k melanoma in situ, ~3.8k invasive melanoma, and ~448k controls).pmc.ncbi.nlm.nih.govThere was a dose-response pattern: higher reported sunscreen use correlated with higher risk.
Associations reported: Frequent/always sunscreen use showed positive associations with higher skin cancer risks (adjusted for factors like age, sex, skin type/color, hair color, tanning ability, sunburn history, sunlamp use, and time outdoors). Relative risks (RR) included:Invasive melanoma: up to ~3.92 (i.e., 292%)
Basal cell carcinoma (BCC): ~2.40 ( 140%)
Cutaneous squamous cell carcinoma (cSCC): ~2.26 ( 126%)
Melanoma in situ: similar elevated range (e.g., up to ~3.58 for very frequent use).pmc.ncbi.nlm.nih.gov
"Sunscreen paradox" label: The study authors (Jeremian, Xie, Litvinov et al.) and related McGill work explicitly use this term. They interpret it as confounding by behavior—people who use more sunscreen often have higher UV exposure (e.g., staying in the sun longer because they feel protected, or not reapplying adequately). It is not presented as causation by sunscreen
itself.mcgill.ca