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.
So while organ meats are actually good for everyone, it's actually even more important for someone eating a very low carbohydrate ketogenic
diet to go out of their way to eat organ meats up to
several times per week!