Before revision: Vitamin D and Omega-3 Trial (VITAL) (VITamin D and OmegA-3 TriaL) is a "randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or omega-3 fatty acids (Omacor ® fish oil, 1 gram) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses".
After revision: Vitamin D and Omega-3 Trial (VITAL) (VITamin D and OmegA-3 TriaL) is a "randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or omega-3 fatty acids (Omacor fish oil, 1 gram) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses".