13 Nov 2018 --- Omega 3 fatty acids can aid in reducing the risk of heart attacks, especially among African Americans, while vitamin D can reduce cancer deaths over time. These are among the long-awaited findings of the VITamin D and OmegA-3 TriaL (VITAL) study. VITAL is the first randomized clinical trial of a general population large enough to adequately address questions surrounding the effects of vitamin D and omega 3 fatty acids derived from fish oil, in high doses, on the risk of diseases such as heart attack, stroke and cancer.