References

References

1. Sally Beauty, “Sustainability,” https://www.sallybeautyholdings.com/~/media/Files/S/Sally-Beauty/documents/sustainability-2024.pdf, accessed February 1, 2026.

2. Zota, Ami R. et al., “The environmental injustice of beauty: framing chemical exposures from beauty products as a health disparities concern,” American Journal of Obstetrics & Gynecology, Volume 217, Issue 4, 418.e1 – 418.e6

3. National Institutes of Health, “Permanent hair dye and straighteners may increase breast cancer risk,” News Release, December 4, 2019,  https://www.nih.gov/news-events/news-releases/permanent-hair-dye-straighteners-may-increase-breast-cancer-risk, accessed February 1, 2026.

4. Che-Jung Chang, Katie M O’Brien, Alexander P Keil, Symielle A Gaston, Chandra L Jackson, Dale P Sandler, Alexandra J White, Use of Straighteners and Other Hair Products and Incident Uterine Cancer, JNCI: Journal of the National Cancer Institute, Volume 114, Issue 12, December 2022, Pages 1636–1645, https://doi.org/10.1093/jnci/djac165, accessed February 1, 2026.

5. Edwards, L., Ahmed, L., Martinez, L., Huda, S., Shamasunder, B., McDonald, J. A., Dubrow, R., Morton, B., & Zota, A. R. (2023). Beauty Inside Out: Examining Beauty Product Use Among Diverse Women and Femme-Identifying Individuals in Northern Manhattan and South Bronx Through an Environmental Justice Framework. Environmental Justice, 16(6), 449-460, https://journals.sagepub.com/doi/10.1089/env.2022.0053, accessed February 1, 2026.

6. Sally Beauty, DIY University by Sally, “Know Your Curl Type,” https://www.sallybeauty.com/just-ask-sally/articles/know-your-curl-type/, accessed February 1, 2026.

7. Washington Department of Ecology, “Toxic-Free Cosmetics Act: Restricted Chemicals Under TFCA,” https://ecology.wa.gov/waste-toxics/reducing-toxic-chemicals/washingtons-toxics-in-products-laws/toxic-free-cosmetics-act#formaldehyde, accessed February 1, 2026.

8. Washington Department of Ecology, “Toxic-Free Cosmetics Act: Restricted Chemicals Under TFCA,” https://ecology.wa.gov/waste-toxics/reducing-toxic-chemicals/washingtons-toxics-in-products-laws/toxic-free-cosmetics-act#formaldehyde, accessed February 1, 2026.

9. ECHA, “Cyclic Siloxanes,” https://echa.europa.eu/hot-topics/cyclosiloxanes, accessed February 2, 2026.

10. Sally Europe, “Who We Are,” https://careers.sallyeurope.com/who-we-are, accessed February 1, 2026.