Should you take a Vitamin D tablet every day?

Available for over a year

Vitamin D is the rising star of the supplement world, following research linking low levels to a number of diseases including bowel cancer, multiple sclerosis, diabetes and Alzheimer's. And now it’s in the headlines again – it claims that supplements can help ward off coughs, colds and flus. Dr Mark Porter and Dr Margaret McCartney take a look at the study that generated the headlines. First broadcast on Inside Health, 22 February 2017.