>>> I think the psychological part is sort of like the situation with certain long-term vegetarians who do not 'believe' in meat-eating, and it just becomes something they don't and maybe can't do or would find very difficult. <<<< It could be of interest that many people who stop eating 'avoids' for their blood-types find quite negative responses to some of them when they try them again. For example, I used to 'live' on bread and cheese: last time I ate a mouthful of bread it tasted like cardboard (this had been my fave brand before!), and some avoids give me headache (never before!). Difficulty in digestion can also be a problem. So if a person who gave up meat that was unsuited to their blood-type, I would expect two things: they would probably fare better (providing the replacement was not an avoid), and they would get strong negative reactions (whether by taste, digestion, allergic reaction or all). I went for an extended period without meat, but found an immediate liking for it on resumption. Psycological? hmmmm... Lynton