Sunlight and Breast cancer..a positive Cure

Learn the latest research..

Does sunlight affect breast cancer risk?

This was a relatively large population-based case-control study. The findings indicated that women who spent a lot of time outdoors had a lower risk of breast cancer than those who spent very short periods of time outdoors.
Where did the story come from?
The study was carried out by researchers from Cancer Care Ontario. Funding was provided by the Canadian Breast Cancer Research Alliance. The study was published in the peer-reviewed Journal of American Epidemiology.

What kind of research was this?
This study investigated whether there was an association between vitamin D production from exposure to sunlight and breast cancer risk.

What did the research involve?
The researchers used data from the Ontario Women’s Diet and Health Study. In this study, the Ontario Breast Cancer Registry was used to identify women who were 25–74 years old who developed breast cancer in 2002 and 2003. The researchers contacted 4,109 of these women, and 3,101 of them took part in the study in 2003 and 2004. As a control group, women of a similar age who did not have breast cancer were randomly selected from households in Ontario, and 3,420 of them completed the study.
The results showed that:
Women who had higher solar vitamin D scores in their teenage years had a 21% lower risk of breast cancer compared to women with lower scores (OR 0.79, 95% CI 0.68 to 0.91).
Women who had higher scores in their 20s and 30s had a 24% lower risk of breast cancer compared to women with lower scores (OR 0.76, 95% CI 0.65 to 0.89).
Women who had higher scores in their 40s and 50s had a 25% lower risk of breast cancer compared to women with lower scores (OR 0.75, 95% CI 0.64 to 0.88).
Women who had higher scores between the ages of 60 and 75 years old had a 41% lower risk of breast cancer than people with lower scores (OR 0.59, 95% CI 0.46 to 0.7

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Sunlight and Breast cancer