I am often asked what I think about blood type (ABO grouping, RH factor) dietary schemas which purport to tell people which foods to eat and which to avoid. Here, in brief, are my thoughts. This page will likely expand with the passage of time -- this is a work in progress!
In 1996 through 1997, in two separate tests using urine Indican testing, I was able to demonstrate that although I was chronically (daily) eating large quantities of foods which are not, according to D'Adamo's book, suitable for my blood type, I showed no trace of urinary indoles (which would indicate undesirable fermentation in the lower GI tract), as repeatedly and strongly predicted by Dr. Peter D'Adamo in his book. I attempted to correspond with D'Adamo via his message board, about this discrepancy, but never received a response from him. Interestingly, my post to his board did elicit several private responses from others who had observed that their bodies simply did not react in the clockwork fashion to food as predicted by the "Recommended" and "Avoid" food lists for their blood types from D'Adamo's book. I have since heard a number of anecdotal, experience-based stories which tend to support what I had noticed.
My estimation as a scientist, as well as an
is that D'Adamo's Blood Type schema is an almost-hopeless
-- with lots of concomitant errors -- of a complex fact that each of us
has differing genetics, and that each of us reacts differently to
foods. Unfortunately, I do not believe blood type to be a particularly
reliable way of decoding those genetic preferences. However, for
people eating cooked foods diets, I do believe that blood type schema
be a convenient starting point, and far better than no guidance at all,
in helping to set up an initial diet. However, even here I recommend
fine-tuning and tinkering based upon what your body really needs and
and what it does not want.
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