Only in very rare circumstances and with certain forms of cancer present. The most common cause of seemingly changed blood types is the antigen sensitivity of the chemicals used to test the blood. Drugs or other factors about your blood may cause an erroneous readings. Operator error or poor lighting can result in an incorrect interpretation of the test results.
Dr. Peter D'Adamo, author of Eat Right 4 Your Type, developed Genoma Security to help your immune system work at peak efficiency. It is comprised of a traditional blend of well-researched herbal ingredients designed to support a healthy immune response.