A new study reveals vitamin D levels can remain low in some people despite abundant exposure to sunlight.

Researchers at the University of Wisconsin investigated the vitamin D status of people living in sun-drenched Hawaii . The participants in the study had a mean of 11.1 hours per week of total body skin exposure with no sunscreen used.

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Cancer has been defined as the “accumulation of mutations in genes that regulate cellular proliferation.” Once genes that regulate cell division mutate, normal cells can turn into cancer cells.

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In 1941, the first scientific study was published showing that greater sunlight exposure resulted in lower cancer mortality. People living in northern latitudes were shown to contract more cancers than those in southern latitudes, where there is greater year-round sun exposure.

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