Diet and Sunlight

 

A study of eating patterns across different countries confirms an association between breast cancer sunlight exposure which may be protective against the disease by elevating the body's vitamin D supply.

In the study, researchers looked at dietary supply data for a number of countries in North and South America, Asia and Europe. Such data reflects only the supply of food in a given country, and not the food intakes of different people. Exposure to the sun's ultraviolet-B (UV-B) rays was estimated based on a country's latitude.

As for the role of sunlight, researchers found an association between latitude and breast cancer suggesting that higher UV-B exposure was protective. UV-B rays spur the production of vitamin D in the body, it is likely the vitamin is behind the association he found in this study. Other research suggests vitamin D may help ward off cancer.

Cancer January 1, 2002;94:272-281

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