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Questions About The Diets

No Bacon For Any Blood Type?


QUESTION

Why is pork an avoid for all blood types?


ANSWER

Pigs (like most non-humans) induce xenoreactive antibodies which in turn upregulate our own anti-ABO antibodies (the isohemagglutinins). This antigen in pigs, galactose alpha-(1-3) galactose, is apparently the target for these antibodies (which all adult humans have.) Though found in many mammals, pig xenoreactive antigens are probably more potent than most, since virtually every human carries antibodies to pork. Indeed, in every patient on whom I've ever tested blood group antibody levels, and who was a big pork consumer, the levels of antibody titer were always elevated.

  1. Parker W1, Lundberg-Swanson K, Holzknecht ZE, Lateef J, Washburn SA, Braedehoeft SJ, Platt JL. Isohemagglutinins and xenoreactive antibodies: members of a distinct family of natural antibodies.Hum Immunol. 1996 Feb;45(2):94-104.



The Ask Dr. D'Adamo internet advice column ran from 1996 to 2009, at which time Dr. D'Adamo's teaching and programming responsibilities no longer allowed him to devote time and resources to directly answering visitor questions. However we've recently reorganized this treasure-trove of material and made it again available to his readership. He occasionally posts new entries. These are marked with a NEW tag.



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