Ask Dr. D'Adamo

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Questions of A More Technical Nature

Negative and Positive


I am B+. Is there a difference in the diet plan based on negative or positive?


No real difference has been noted with regard to the Rh blood type and diet. This is for several reasons. First the Rh antigen (if you are Rh+) is only a very weak antigen and not expressed in tissue outside of the red blood cells. Thus there are no known lectins capable of attaching to it. Second, the anti-Rh antibody (if you are Rh-) is a weak antigen, and is not capable of attacking foods or other environmental things. There is a study showing a higher rate of auto-immune disease in Rh- over Rh+, and I sometimes take this into account when treating type O-'s who have inflamatory disease. But the basic answer is no, there is no difference in the eating plan one way or the other.

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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