raising a woman’s vitamin D levels to 40-60 ng/ml would prevent 58,000 new cases of breast cancer and three-fourths of deaths from these

http://naturalsociety.com/risk-breast-cancer-6x-higher-women-low-vitamin-d/

There are few foods that contain any significant amount of vitamin D. Those few foods include: sardines, eggs, cheese, mushrooms, beef liver, and salmon. Most of our vitamin D comes from exposing the skin to sunlight, which can be tricky in colder months. While many foods in the U.S. are fortified with vitamin D, these foods are often highly processed cereal grains.

Keeping vitamin D levels high must be a concentrated effort, with real attention paid to the risks and benefits of your D sources. In addition to taking vitamin D supplementing, which is necessary during the winter months,