Breast Cancer testing to start at 40 (no mention of prevention )
ACOG Updates Breast Cancer Screening Guidelines
"...recommending that individuals at an average risk for breast cancer initiate mammography screening at age 40. "
"Between 2015 and 2019, the incidence of invasive breast cancer in women aged 40-49 years increased by approximately 2% per year."
VitaminDWiki – Overview Breast Cancer and Vitamin D contains:
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VitaminDWiki – Cancer - Breast table of contents as of Oct 2024

Page includes
Breast Cancer again associated with low vitamin D – 15th meta-analysis Sept 2020
Death due to breast cancer reduced 40 percent if high vitamin D – meta-analysis April 2014
Suspect Breast Cancer 4X less likely if take a single daily pill ($64/year)
1 gram of Omega-3 and 5,000 IU of Vitamin D Amazon
An additional anti-oxident pill a day would help even more
Breast Cancer risk reduced if consume butyrate - Dec 2023
Thus, Breast Cancer risk would be reduced from 1 in 8 to 1 in 32
The same pill would also fight at least the following
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