Oxybenzone (benzophenone-3; BP-3) is a toxic endocrine-disrupting chemical (EDC). Alarmingly, this chemical has been identified as a common ingredient in some brands of sunscreen. Oxybenzone can often be found in humans, household dust, fish and, due to its widespread human use, the water environment—causing harm to coral reefs and other murine life. Previous studies have shown that environmental toxins and estrogenic chemicals have emerged as potential culprits in the promotion of breast cancer. Furthermore, oxybenzone has been known to have estrogenic and anti-estrogenic properties.
“Although BP-3 has a very short half-life, its presence is widespread in human urine [9], in as much as 98% of the general U.S. population [13].”
Researchers from the Breast Cancer and the Environment Research Program at Michigan State University studied the diet-dependent effects of oxybenzone in mouse models of mammary tumorigenesis during puberty and adulthood. Their paper was published by Oncotarget in 2020, and entitled, “Benzophenone-3 promotion of mammary tumorigenesis is diet-dependent.”
“We [previously] demonstrated enhancement of mammary tumorigenesis by a diet high in saturated animal fat (HFD) [5–8]. Thus, examination of the activity of EDCs in a dietary context may provide additional insight into the potential role of EDCs in promoting breast cancer.”
Full blog - https://www.oncotarget.org/2021/11/17/sunscreen-ingredient-promotes-breast-cancer-in-diet-dependent-manner/
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DOI - https://doi.org/10.18632/oncotarget.27831
Full text - https://www.oncotarget.com/article/27831/text/
Correspondence to - Richard C. Schwartz - schwart9@msu.edu and Sandra Z. Haslam - shaslam@msu.edu
Keywords - oxybenzone, benzophenone-3, mammary tumorigenesis, dietary animal fat, breast cancer
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