Cod Liver Oil
Like animal livers, fish livers are a great source of vitamin A as well. A tablespoon of oil extracted from cod liver contains more than 4000 mcg of vitamin A. More importantly, it is one of the greatest sources of omega-3 fatty acids, which can help boost heart health and fight inflammation. Some studies have indicated that the food may prevent or treat depression as well. Another important nutrient that can be found in cod liver oil is vitamin D, with more than 170 percent of the daily recommended intake in 1 tablespoon. This element is important for bone health and immunity function. [8]
