![]() ![]() Therefore, the B positive blood type diet and the B negative blood type diet include both vegetable and animal foods. They adapted from being strictly herbivorous to eating mostly dairy and meat products. Here we can start to understand the role of the blood type diet. As you look further west, the B blood type can be found in people of Asian nomadic migration. The B blood type is most common in Pakistan, India, Bangladesh, Korea, Japan, China, Mongolia, Thailand, and China. Their livelihood depended on domesticating animals, and so they ate a lot of dairy and meat. It first appeared in India and in the Ural region of Asia, where there was a mix of Mongolian and Caucasian tribes.īlood type B soon became a characteristic that defined tribes of steppe dwellers as they moved through Asia. ![]() It is believed that blood type B started as a mutation in response to climate change. In order to fully understand why certain foods should be avoided or eaten on the B positive blood type diet or the B negative blood type diet, it’s helpful to understand how this blood type evolved.Ī large migration from the hot climate in Africa to the cold climate of the Himalayan highlands-what is now part of India, Nepal, Tibet, and Pakistan-caused quite a shock to blood type A people. RELATED: Be Your Healthiest With the B Blood Type Diet History of B Blood Type Here, we’ll learn all about the blood type diet: B. Certain foods that are ideal for one blood type may lead to weight gain and disease in another. It seems logical, then, that the four blood types respond to different foods in different ways. It is believed that each blood type hints to a different but rich history, including where your ancestors came from, what climate they lived in, what they did for a living, and what they ate on a daily basis. However, they couldn't find one, so they concluded that either the benefit existed in the evolutionary past and does not anymore, or humans have those two Rh types because of random chance.Your blood type provides a general look into your ancestral history. (This is what the + and - that follow blood groups indicate, for example A+ or B-.) In a 2012 study published in the journal Human Genetics, researchers investigated whether there was an advantage to being Rh negative that would keep this genetic variation around, despite it sometimes causing rhesus disease - a condition in which a pregnant person's antibodies attack their baby's blood cells. It's also unclear why most people have a protein known as the Rhesus (Rh) factor on the surface of their blood cells, making them Rh positive, although about 15% of Caucasians, 8% of Black people, and 1% of Asians lack this protein, making them Rh negative. "Malaria is the only one where it really seems to bear itself out," she said. As such, they don't actually find evidence of blood types causing protection or susceptibility to diseases. These studies did not prove a causal relationship between blood type and the prevalence of these diseases the links may be due to other factors. Should we kill every mosquito on Earth?Ĭohn doesn't find these associations convincing, though, especially not as a potential reason for why humans have different blood types. Other blood types are more likely to have other diseases for example, people with type AB blood are more likely to have smallpox and Salmonella and E. For example, a 2021 study in the journal BioMed Research International found that people with type O blood are more likely to have cholera, plague, tuberculosis and mumps. Some scientists point to disease associations between various blood types. There's quite a bit of evidence for why populations that evolved in malaria-prone areas have type O blood, but it's less clear why type A, B and AB blood can be found in relatively high proportions elsewhere. Duffy negativity is common throughout sub-Saharan Africa, where malaria is most prominent, but it is rarely seen elsewhere in the world, according to the Malaria Atlas Project. People who lack the Duffy antigen are relatively resistant to one of the two major malaria parasites. In addition to those that cause the four main blood groups, there are 15 other types of antigens that can be present on the surface of red blood cells, Cohn told Live Science. Yet blood group isn't the only aspect of a person's blood that affects their malaria risk. But whereas RIFIN binds strongly to the surface of type A red blood cells, it binds weakly to type O red blood cells, according to a 2015 study in the journal Nature Medicine. This is at least partially because the malaria parasite makes infected red blood cells express a protein on their surface called RIFIN, which acts like a glue that makes uninfected red blood cells pile up around an infected red blood cell, according to a 2015 study in the journal Nature Reviews Microbiology. ![]()
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