COMMENTARY: Undoubtedly if the reviewers had blood grouped the study's participants, they would have found that the majority of the vegan nuns who had lost the most bone were blood group O, since calcium absorption is more dependant in this blood group on the actions of enzymes in the intestines that are activated by protein and fat. Even type A's could benefit from a mineral supplement, especially if it were formulated with a small amount of vitamin A, which turns on the intestinal enzymes in this blood group. Ann's NOTE: Dr. D'Adamo suggests that people with blood type O should eat meat (non-hormone, non-antibiotic) and that people with type A are more likely to be at risk for cancers. Remember we are NOT Doctors and have NO medical training. This site is like an Encylopedia - there are many pages, many links on many topics. Support our work with any size DONATION - see left side of any page - for how to donate. You can help raise awareness of CAM.