What is a blood group?

Another criticism is that even though D'Adamo claims there are many ABO specific lectins in foods, this does not agree with what is found in the scientific literature. In research done by separate and independent groups of biochemists, on lectins in different foods and their reactions with ABO blood type, show that there is no difference in how the lectins react with any human ABO type. Lectins which are preferential for a particular ABO type are not found in foods (except for one or two rare exceptions, i.e. lima bean). Lectins with ABO specificity are more frequently found in Non-food plants or animals.