Answer:

Very good question.  While the ingredients for each of the four supplements seem compatible with their respective blood types, I refrain from endorsing them for two reasons.

The first reason are food sensitivities/food allergies.  When I incorporate blood type food planning into a client's diet,  I always take into consideration the food sensitivities/food allergies of the individual.  Food sensitivity/food allergy overrides blood type.  Soy exists in at least one of the "for blood type supplements."  So, for instance, if the blood type A diet says that an individual with blood type A can eat soy, but doesn't take into consideration the food sensitivity/allergy that individual suffers, the supplement could do more harm than good.

The second reason is the "for blood type supplements" may not contain a sufficient amount of essential nutrients needed for specific individuals and may give them a false sense of security.  It's possible that some individuals could add them to an already existing multi vitamin/mineral, if no reactions are noted.

Have a happy, healthy day - Bonnie