The Blood Type Diet

Peter J. D’Adamo, a naturopathic physician, created the Blood Type Diet in 1996. According to his theory, is everyones personal blood type responsible for how well we get along with certain foods. The reason are specific proteins in definite foods. Protein intolerance could supposedly lead to a defense response followed by blood clumping. This reaction can lead to overweight, thyroid dysfunction and digestive problems.

Eat Right For Your Blood Type

The individualized diet solution to staying healthy, living longer and achieving your ideal weight. Adamo writes that our blood types originated in prehistoric times.

  • Type O came from people who were hunter/gatherers and had acidic stomachs for digesting meat.
  • Type A originated between 25,000 and 15,000 B.C. in farmers who had a lower stomach acid level for digesting grains and legumes.
  • Type B originated between 10,000 and 15,000 B.C in nomads who ate the meat and dairy of cattle, goats, and sheep.
  • Type AB was an amalgam of A and B.

D’Adamo suggested that modern people benefit greatly from eating the foods according to their blood types. For example, dairy is healthful for Type B’s but not Type A or O. Red meat should be eaten by Type O’s but not by Type A’s. With regard to beverages, coffee is good for Type A’s and AB’s, but not for Type O’s. This diet plan has met with some resistance from Type O vegetarians and Type A meat eaters in particular.

D’Adamo tells them that some foods outside their blood type might prove to be beneficial in improving their strength and cholesterol levels. The ideal diet, D’Adamo notes, includes herbs and regular exercise, based on blood type. While types A and AB do better with yoga, brisk walking or swimming, Types O and B benefit from vigorous exercise. He concludes that yoga is useful for all four types, but types O and B should combine it with more high-intensity exercise such as aerobics, martial arts, cycling or jogging.

Critics argue that there is no scientific evidence that supports D’Adamo’s claims. They note that there has never been a controlled study on blood type diets. D’Adamo’s theory is based solely on his institution and anecdotal stories. It has its roots in the study of lectins, proteins found on the surface of certain foods that can cause various molecules and some types of cells to stick together.

He suggested that lectin proteins are similar enough to one type of blood antigen to cause the antigens of another blood type to produce antibodies to attack and agglutinate (glue together), clumping the blood.

D’Adamo claims that this contributes to

  • irritable bowel syndrome
  • cirrhosis of the liver
  • kidney failure

depending on the food protein and the blood type. Most people do not eat according to their blood type and, according to D’Adamo, are eating the wrong foods. If his theory was correct, however, practically everyone would experience a build up of agglutinated red cells after meals and quickly get clogging in the heart, lungs, kidneys, brain, eyes, and other essential organs. These organs would be damaged beyond repair, resulting in death in millions of people. Pathologists and other medical scientists have never reported this happening in humans.

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