Dangers Of Cod Liver Oil

Main Category: Nutrition / Diet
Also Included In: Public Health
Article Date: 12 Nov 2008 - 2:00 PDT

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Today, sixteen well-known experts, including professors Walter Willett and Ed Giovannucci of Harvard, Dr. John Hathcock of the Council for Responsible Nutrition, and Professor Reinhold Vieth of the University of Toronto, published an unprecedented warning about the ingestion of cod liver oil and resultant vitamin A toxicity.

Using the strongest language published to date, the group condemned the current (1997) Food and Nutrition Board (FNB) recommendations for vitamin D, stating "The 1997 FNB recommendations offend the most basic principles of pharmacology and toxicology, leading us to conclude that the current official guidelines and limitations for vitamin D intakes are scientifically indefensible."

In addition to warning about the consumption of cod liver oil, the above experts recommended healthy children take 1,000 IU/day of vitamin D for every 25 pounds of body weight. In some cases this is more than ten times current recommendations for children by the government and professional organizations.

Finally, the group recommended that "children with chronic illness such as autism, diabetes, and/or frequent infections" may need to take even more vitamin D, "doses adequate to maintain their 25-hydroxy vitamin D in the mid normal of the reference range (65 ng/ml) - and should be so supplemented year around." Less than one percent of American children currently have such levels.

"Cod Liver Oil, Vitamin A Toxicity, Frequent Respiratory Infections, and the Vitamin D Deficiency Epidemic"
John J. Cannell, MD; Reinhold Vieth, MS, PhD; Walter Willett, MD, DrPH; Michael Zasloff, MD, PhD; John N. Hathcock, MSc, PhD; John H. White, PhD; Sherry A. Tanumihardjo, MSc, PhD; D. Enette Larson-Meyer, PhD; Heike A. Bischoff-Ferrari, MD, MPH; Christel J. Lamberg-Allardt, PhD; Joan M. Lappe, PhD, RN; Anthony W. Norman, PhD; Armin Zittermann, PhD; Susan J. Whiting, MSc, PhD; William B. Grant, PhD; Bruce W. Hollis, PhD; Edward Giovannucci, MD
Annals of Otology, Rhinology & Laryngology - 2008;117:864-870

Source
John Cannell, MD
http://www.vitamindcouncil.org/