One of the largest supplement trials ever — and one not funded by a manufacturer — has questioned whether fish oil and vitamin D supplements are any better than placebo in preventing cancer and heart disease.
It suggests that for most people, the supplements don’t work. But they may have benefits for particular groups of people.
Dr JoAnn Manson
Professor of Medicine, Harvard Medical School, Brigham and Women’s Hospital; Principal Investigator, Vitamin D and Omega-3 Trial (VITAL)
Dr Norman Swan