> FYI, making such statement (and the FEW others on this diet) makes you
> an exception & not the rule.

Humans developed during some million years. They ate what they found that
gave more nourishment than it costed and was not immediately lethal.
Eventually they spread all over the world and kept on developing  and kept
on eating whatever there was that gave nourishment and was not immediately
lethal. They had different blood groups. They still have different blood
groups. They had no way of knowing that they had different blood groups. If
there ever were people who got sick from eating for instance red meat they
would have been sorted out by nature as being the unfit ones.

The very essence of evolutionary thinking and understanding sets these sort
of ideas aside as being ideas having no anchorage in reality. If there ever
was such a blood group it would no longer exist as in fact it does not.
The idea though is lucrative and will no doubt live a little longer.
Eva