What Do Scientists Know About Vitamin D and Cancer?

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We know that sunshine helps us get enough of the sun's UVB rays, which are good for our bones and immune system. The sun's angle and strength make it hard for people living in cold climates to get their daily sun dosage from November through April. In regions where it is easier to get year-round sun exposure, fewer people get breast cancer than in colder regions, according to a review of multiple studies in Environmental Health Perspectives in 2020.

Scientists have looked at the link between breast cancer and the amount of vitamins D and D3. There are conflicting studies on whether or not vitamins D and calcium can prevent breast cancer. The results of many studies published in Nature in the last year were not conclusive. The meta-analysis concluded that young women with high levels of vitamin D have a protective effect, but they couldn't say if it was a benefit or not.