Article pulled from https://www.westonaprice.org/health-topics/cod-liver-oil/cod-liver-oil-basics-and-recommendations/#brands&gsc.tab=0
FEBRUARY 9, 2009 BY SALLY FALLON AND MARY G. ENIG, PHD
Last updated 2019 – Concerns about Fermented Cod Liver Oil – Questions and Answers About Fermented Cod Liver Oil Loos for: Brand Recommendations (COMING IN FUTURE POST)
Updated 2019 - Once a standard supplement in traditional European societies, cod liver oil provides fat-soluble vitamins A and D, which Dr. 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. Those individuals who have consumed large amounts of polyunsaturated oils, especially partially hydrogenated oils, who are suffering from certain nutrient deficiencies, or who have impaired pancreatic function, such as diabetics, may not be able to produce EPA and DHA and will, therefore, lack important prostaglandins and necessary fats for the brain unless they consume oily fish or take a cod liver oil supplement. Buy cod liver oil in dark bottles and store in a cool, dark, dry place.
Look for: Vitamin A, Vitamin D, and Cod Liver Oil: Some Clarifications (COMING IN FUTURE POST) for amounts to give to adults and children and for recommended brands. Cod liver oil is easy to take when stirred into a small amount of water or fresh juice. Dr. Price always gave cod liver oil along with high-vitamin butter oil, extracted by centrifuge from good quality spring or fall butter. He found that cod liver oil on its own was relatively ineffective but combined with high vitamin butter oil produced excellent results. The butter oil contains what he called Activator X, now considered to be vitamin K2, which works synergistically with vitamins A and D
Look for: (Chris Masterjohn’s article “On the Trail of the Elusive X Factor: A Sixty-Year Old Mystery Finally Solved” (COMING IN FUTURE POST). Your diet should include sources of vitamin K, such as good quality butter from grass-fed cows and/or high-vitamin butter oil, fat from grass-fed animals, cheeses from grass-fed animals and duck or goose liver, along with cod liver oil.