Why Kim Kardashian's Favorite Supplement is Raising Cancer Concerns

Celeb-loved supplements touted for their anti-aging properties could fuel more than just your cells — they could fuel cancer.

Famous folks from Kim Kardashian to biohacker Bryan Johnson have talked about oral supplements that increase NAD+, a molecule used in every living cell in your body to make energy, repair DNA and protect cells.

New research says these NAD+ precursor supplements — nicotinamide mononucleotide, nicotinamide riboside and niacinamide/nicotinamide — may inadvertently also be helping cancer survive and even resist treatment.