According to a study from the National Cancer Institute (NCI), increased vitamin D levels in the body have no benefit in eliminating or reducing the risk for cancer. Scientists did not see a lower cancer risk in people with a higher vitamin D concentration, nor in people with low vitamin D levels.

The study consisted of analyzing vitamin D levels in blood samples from over 12,000 men and women. Participants followed up for cancer development trials for up to 33 years after the study.

Vitamin D is made by the body when the skin is exposed to sunlight. It is necessary for healthy bone development, immunity and calcium absorption. Many people throughout the world have naturally low levels of vitamin D. According to the Food and Nutrition Board of the Institute of Medicine – National Academy of Sciences, the recommended intake is 200-600 IU (internal units) a day. This recommendation is dependent on age, as higher levels are recommended for the elderly. Foods that contain vitamin D include fish, eggs, milk, juice, yogurt, bread and breakfast cereals.