American women of African ancestry are more likely than European Americans to have estrogen receptor (ER) negative breast cancer.

The indication that vitamin D and its derivatives have a protective effect against various types of cancer is not new.

Researchers have linked a variant in the vitamin D receptor gene (VDR) with the onset of chronic obstructive pulmonary disease (COPD) in Caucasian men.

For years, scientists have thought of DNA as a passive blueprint capable only of producing specific proteins through RNA transcription.

Vitamin D insufficiency is a risk factor for a number of diseases and thus, is a growing concern worldwide, as approximately one billion people may be vitamin D deficient.