71% LOWER BREAST CANCER RISK With Vitamin D Level of 60 vs. 20 ng/ml
~85% LOWER BREAST CANCER RISK With Vitamin D Level of 85 vs. 20 ng/ml [estimate from this chart]
~92% LOWER BREAST CANCER RISK With Vitamin D Level of 95 vs. 20 ng/ml [estimate from this chart]
• 30-100 ng/ml blood level is considered “normal.” Majority of Alaskans are at about 20 ng/ml — very high risk
• 10,000 iu of vitamin D3 per day will get many people to 80-100 ng/ml. Overweight and obese will likely require higher amounts to achieve 80-100 ng/ml
• To find out your level, Alaska Health Fair does vitamin D screenings for $50
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Analysis of 70 Studies Finds 71% Lower Breast Cancer Risk With Vitamin D Level of 60 vs. 20 ng/ml
October 27, 2020
Breast Cancer Risk ~70% Lower with Higher Vitamin D (60+ ng/ml) – Part 5
In a previous post we summarized an analysis published by GrassrootsHealth that showed women with vitamin D levels at or above 60 ng/ml (150 nmol/L) had an 80% lower breast cancer risk compared to women with levels less than 20 ng/ml (50 nmol/L). In another post we discussed a study that found the same result among women in the United Kingdom — an 83% lower breast cancer risk with vitamin D levels above 60 ng/ml. In today’s blog we will summarize the findings from a third study, a 2019 meta-analysis by Song et al. which analyzed data from 70 observational studies.
Breast Cancer Risk Declined as Vitamin D Level Rose
The dose response relationship between vitamin D level and breast cancer risk is shown on the chart below. Specifically, the researchers found a 6% decrease in breast cancer risk for every 2 ng/ml (5 nmol/L) increase in vitamin D level. This translates to a 71% lower risk from 20 to 60 ng/ml (50 to 150 nmol/L).
The similar findings between these three studies (GrassrootsHealth, Lowe et al., and Song et al.) emphasize the importance of improving vitamin D status for breast cancer prevention.
Entire study at PubMed:
Vitamin D intake, blood vitamin D levels, and the risk of breast cancer: a dose-response meta-analysis of observational studies, 2019 Dec 28 — Song, et. al.