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Black and Hispanic women with low vitamin D more likely to develop breast cancer

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Black/African American or Hispanic/Latina have lower average vitamin D levels than non-Hispanic white women. Although research suggests that vitamin D may protect against breast cancer, few studies have considered the role of race/ethnicity in this link. Image for illustration purposes
Black/African American or Hispanic/Latina have lower average vitamin D levels than non-Hispanic white women. Although research suggests that vitamin D may protect against breast cancer, few studies have considered the role of race/ethnicity in this link. Image for illustration purposes

Mega Doctor News

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By Wiley

Newswise — Among women who identified as Black/African American or Hispanic/Latina, those with low blood levels of vitamin D were more likely to develop breast cancer than those with adequate levels. In the study published by Wiley online in CANCER, a peer-reviewed journal of the American Cancer Society, the link between low vitamin D and breast cancer was particularly evident among Hispanic/Latina women.  

Black/African American or Hispanic/Latina have lower average vitamin D levels than non-Hispanic white women. Although research suggests that vitamin D may protect against breast cancer, few studies have considered the role of race/ethnicity in this link. 

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To investigate, Katie O’Brien, PhD, of the National Institute of Environmental Health Sciences, and her colleagues collected blood samples from 415 women (290 Black/African American, 125 non-Black Hispanic/Latina) who later developed breast cancer, as well as from 1,447 women (1,010 Black/African American, 437 Hispanic/Latina) who did not develop breast cancer. 

Over an average follow-up of 9.2 years, women with sufficient vitamin D levels had a 21% lower breast cancer rate than women with vitamin D deficiency (<20 ng/mL). The link was strongest among Hispanic/Latina women, who had a 48% lower rate if they had sufficient vitamin D levels. The link was weaker among Black/African American women, who had an 11% lower rate if they had sufficient vitamin D. 

“Together with prior studies on this topic, this article suggests that vitamin D may be associated with reduced risk of breast cancer, including among women who self-identify as Black, African-American, Hispanic, or Latina,” said Dr. O’Brien. “Because women who identify as members of these groups have lower vitamin D levels, on average, than non-Hispanic white women, they could potentially receive enhanced health benefits from interventions promoting vitamin D intake. However, questions remain about whether these associations are truly causal and, if so, what levels of vitamin D are most beneficial.” 

About the Journal 
CANCER is a peer-reviewed publication of the American Cancer Society integrating scientific information from worldwide sources for all oncologic specialties. The objective of CANCER is to provide an interdisciplinary forum for the exchange of information among oncologic disciplines concerned with the etiology, course, and treatment of human cancer. CANCER is published on behalf of the American Cancer Society by Wiley and can be accessed online. 

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Follow us on Twitter @JournalCancer 

About Wiley 

Wiley is a global leader in research and education, unlocking human potential by enabling discovery, powering education, and shaping workforces. For over 200 years, Wiley has fueled the world’s knowledge ecosystem. Today, our high-impact content, platforms, and services help researchers, learners, institutions, and corporations achieve their goals in an ever-changing world. Visit us at  Wiley.com, like us on Facebook and follow us on Twitter and LinkedIn. 

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