From the work of Weston Price, we can assume that the amount in primitive diets was about 50,000 IU
per day, which could be achieved in a modern diet by
consuming generous amounts of whole milk, cream, butter and eggs from pastured animals; beef or duck liver
several times per week; and 1 tablespoon regular cod liver oil or 1/2 tablespoon high - vitamin cod liver oil
per day.
One mega-study, that compared
several studies on the topic, found that
consuming nuts at least 4
times per week reduces your risk for heart disease by a whopping 37 percent!