The Best Cod Liver Oils for Optimal HealthCod liver oil is a natural source of omega-3 fat, vitamin D and vitamin A. It may help promote overall wellness. Read more for our best cod liver oil picks. SaVanna Shoemaker, RD | May 10, 2023The Best Cod Liver Oils for Optimal Health / Published May 10, 2023SAVANNA SHOEMAKER, RD