The theories are all different, thus providing no definitive answer. Tracing the evolution of blood type groups can be difficult as there are multiple theories surrounding the progression of blood type science. However, more recent research shows there are several alterations that can neutralize either an A or B gene and “transform” them into O. 1 Blood group O is presumed to be the original blood type of all humans. D ‘Adamo, blood types evolved over time to ensure human adaptation and survival of the species. Detailed charts like this one allow someone to trace the origin of their blood type back to their parents for the purposes of understanding their risk of disease and other factors.Īccording to Dr. Blood classified as “negative” does not contain the Rhesus factor, just as blood type O does not contain an A or B antigen.īlood type is inherited and passed down genetically from our parents. If you’re an Rh-negative blood type, this means you don’t have an antigen - called antigen D - on the surface of your red blood cells. Rh, or Rhesus factor, classifies a blood type into “positive” or “negative” categories. Therefore, blood type O is the “universal” blood donor - if they are also “Rh-negative.” AB blood types have both antigens on red blood cell surfaces, while blood type O has no antigens. Red blood cells will contain antigen A or B. Each antigen reacts differently in terms of its immune response.Īntigens are on the surface of red blood cells.

An antigen is a substance that activates an immune response by stimulating lymphocytes, the white blood cells that defend the body against disease.

Blood types are classified by antigens.

The von Willebrand Factor is named after the Finnish scientist Erik Adolf von Willebrand, who is known for advancing the science of hematology.

With lower levels of this blood-clotting agent, Os have a greater risk of hemorrhaging if injured. The von Willebrand Factor helps prevent bleeding following a vascular injury. Those with blood type O also tend to have lower levels of a blood-clotting protein called the von Willebrand Factor (vWF). For example, stomach ulcers have been found to be more common in blood group O, while stomach cancer is more common to blood group A. If a link between blood-type-based diets and general health cannot be made, multiple links have been established between blood groups that have a greater propensity for developing a given disease. 3 With the advent of the blood group system, ABO blood type could be used by lawyers in paternity suits, for example.įorensic scientists have also come to rely on the system in police science, while anthropologists began using the system to study various civilizations. The development of the ABO blood group system has had a great impact on different branches of science throughout the world. All about Os: Breaking down diet, exercise & personality 2 There doesn’t appear to be a high correlation between blood-type-specific diets and overall health as far as available research is concerned. That said, science has determined that blood type may play a role in the genesis of some disease states - and to a lesser degree, optimal exercise prescriptions and emotional strength. There’s not much in the medical literature confirming some of D ’Adamo’s assertions. 1 When originally released, the book was met with a combination of praise and criticism and became the subject of many a research study in the years since its publication. These factors and more were the basis for the 1996 book (updated and revised in 2016) Eat Right for Your Type: 4 Blood Types, 4 Diets by Dr. In our articles on blood type A, blood type B, and blood type AB*, we examined various components of these blood type profiles - their approach to exercise, what foods are recommended as best to eat, for what diseases or conditions might they uniquely be at risk, and what can be done to abate those risk factors.

It creates an immune response that leads to the production of antibodies (proteins that bind to foreign invaders in the body). An antigen is a molecule that’s introduced to or is unknown to the body and may even be considered a toxin. When an O is also Rh-negative (more on this below), they can donate blood to any blood type and are therefore considered a “universal donor.”įree download: Get the Body Ecology blood type ebook. Lacking an A or B antigen, you are classified as blood type O (positive or negative). The type of antigen found on the surface of red blood cells (antigen A or B) is the factor that determines how a blood type will be classified. Blood type Os tend to be bold, sociable self-starters.

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