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Sister Study report on hair straighteners and uterine cancer, 2022

Journal of the National Cancer Institute paper of October 2022 on 33,947 women followed for about 11 years.

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Dates
17 Oct 2022
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What it found

whereas for frequent use (>4 times per year), the hazard ratio was 2.55 (95% CI = 1.46 to 4.45).1

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Timeline 3 dates
  1. 17 Oct 2022 Sister Study report on hair straighteners and uterine cancer, 2022
  2. 17 Oct 2022 National Institute of Environmental Health Sciences produced Sister Study report on hair straighteners and uterine cancer, 2022
  3. 17 Oct 2022 National Institutes of Health produced Sister Study report on hair straighteners and uterine cancer, 2022
Proof 2 sources
  1. Use of Straighteners and Other Hair Products and Incident Uterine Cancer (Journal of the National Cancer Institute; PubMed Central copy), Journal of the National Cancer Institute, 17 Oct 2022. Scholarship & press
    whereas for frequent use (>4 times per year), the hazard ratio was 2.55 (95% CI = 1.46 to 4.45).
    This work was supported by the Intramural Research Program of the National Institute of Health, National Institute of Environmental Health Sciences
  2. Arizona Accuses L'Oreal of Concealing Cancer Risks Linked to Hair Relaxers (Reuters, via Insurance Journal), Reuters, via Insurance Journal, 14 Sep 2026. Scholarship & press
    The first lawsuits hit the docket after the 2022 release of a study done by the National Institutes of Health that found women who used the products several times a year were more than twice as likely to develop uterine cancer.
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