In my research into nutrition I have discovered this free e book
d'Adamo, Peter J - Eat Right for Your Type - Blood Groups
I am blood group B.
I have only part read/browsed it yet, but what I have read makes sense when I recall which foods I have a sluggish reaction to, and those which I instinctively avoid.
I am surprised to find that chicken is mildly toxic for me, but turkey and pheasant are fine.
That is just one of many snippets of dietary advice aimed at blood group B.
I am going to give the recommendations a try.
Nothing ventured - nothing gained.