Ask Dr. D'Adamo

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Questions of A More Technical Nature

'Live Right For Your Type', AB and Coffee


QUESTION

I am Type AB. In ER4YT coffee is listed as Highly Beneficial. In LY4YT it is listed as Avoid. This is a significant difference! Please let me know which is correct.


ANSWER

Both values are 'correct' although the LR4YT value is perhaps 'more correct.'

In ER4YT coffee was rated beneficial because it contains a few enzymes which can help de-antigenate 'A-like' molecules so as to make the type A (and AB) immune systems function a bit more efficiently.

Whereas this continues to be true for type A, newer evidence suggests that this function is not as important for type AB as it is for type A. Rather, as we saw in a recent ASK DR. D'ADAMO, type AB's need to optimize their Natural Killer Cell (NK cell) activity in preference to their ability to discriminate blood type antigens. With this respect, high levels of caffeine are known to depress NK cells cytotoxicity, so value was adjusted in light of LR4YT's newer Tier system (Coffee Avoidance is a Tier II avoid, which is not as NASA might say 'mission critical.'

In essence, if you are not powering your life by caffeine, to the point where your stress levels are eroding you NK cell activity, a bit of coffee will not be fatal.




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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