With all the talk about Vitamin D, it is important to remember, that in foods like butter (from gradd-fed cows), egg yolks and cod liver oil, they are always together. Once a standard supplement in traditional European societies, cod liver oil provides fat-soluble vitamins A and D, Dr. Weston A. Price found present in the diet of primitives in amounts ten times higher than in modernized diets. Cod liver oil supplements are a must for women and their male partners, to be taken for several months before conception, and for women during pregnancy. Growing children will also benefit greatly from a small daily dose.

Cod liver oil is also rich in eicosapentaenoic acid (EPA) and docasahexaenoic acid (DHA). The body makes these fatty acids from omega-3 linolenic acid. EPA is as an important link in the chain of fatty acids that ultimately results in prostaglandins, localized tissue hormones while DHA is very important for the proper function of the brain and nervous system.