A POPULAR supplement could increase your risk of deadly illness, experts have warned.
Having enough vitamin b3 is important for general good health, and can help keep the nervous system in check, the NHS says.
Along with this, it also contributes to healthy skin and helps the body release energy from food.
But new research has found that the supplement could be linked to an increased risk of serious disease, including cancer.
Medics at the University of Missouri (MU) in the US discovered that high levels of nicotinamide riboside (NR), which is a form of vitamin b3 can increase your risk of triple negative breast cancer.