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A1 and A2 Milk and Health

Emerging evidence is showing an association between a particular protein ( A1beta-casein ) found in cows milk and an increased risk of  developing heart disease and insulin-dependant diabetes.  It may also aggravate neurological conditions such as autism and schizophrenia.

Most cows in the British dairy herd produce milk containing 70% A1but Jersey and Guernsey milk have a lower A1 content of 50% and 4%, respectively, whilst sheep's milk and goat's milk do not contain any A1 beta-casein. 

These research findings are very interesting but are not conclusive and any dietary modification should be taken under the guidance of a Registered Dietitian.

If you would like to talk to the Registered Dietitian at Brain & Body Nutrition please contact  Emma at This email address is being protected from spam bots, you need Javascript enabled to view it or 01623 882853. 

Check out the Channel 5 News report on this item by going to http://news.five.tv/news.php?news=1275  

Posted: June 2008

References:

Birgisdottir & Hill, 2006  ' Lower consumption of cow milk protein A1 beta casein at 2 years of age may explain the lower incidence of type 1 diabetes in Iceland than in Scandinavia'  Annals of Nutritional Metabolism 50 p177-183

Reichelt & Knivsberg, 2003  ' Can the pathophysiology of autism be explained by the nature of the discovered urine peptides ?' Nutritional Neuroscience p19-28

Laugesen & Elliott, 2003 ' IHD, type 1 diabetes and cows' milk A1 beta casein' New Zealand Medical Journal 116 (1168) U295

Knivsberg et al, 2001 ' Reports on dietary intervention in autistic disorders' Nutritional Neuroscience 4 p23-37

MacLachlan, 2001 ' Beta casein A1, IHD mortality and other illnesses' Medical Hypotheses 56 (2) p262-272

Cade et al, 2000 ' Autism and schizophrenia: Intestinal Disorders'  Nutritional Neuroscience 3 p57-72

 

 

 
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