| The concept to "Eat Right For Your Type" - or "Blood Type Diet " is based on research conducted |
| by Peter D'Adamo, ND, who claims that people fare better (including with weight management) when |
| tailoring their diet to their specific blood types. He advises: |
Type A types should basically stick to fruits and vegetables (high carbs / low fat). |
| They have thicker blood than other blood types, a sensitive immune system, |
| and should not consume dairy products, animal fats and meats. They are at |
| a heightened risk for cardiovascular disease, diabetes and cancer. |
| |
| Type B typesshould consume a balanced diet (fruits and vegetables, grains, fish, dairy, meat, |
| but avoid chicken). They have the best chance of bypassing or overcoming |
| everyday types of diseases, including heart disease and cancer. |
| Type AB typesshould consume a mostly vegetarian diet, and only on rare occasions some |
| fish, meat (no chicken), and dairy. |
| Type O typesshould basically stick to a high protein diet (including red meat), low carbs, and |
| enriched with fruits and vegetables. They should limit the intake of wheat germ, |
| whole wheat products, corn, and avoid dairy products and most nuts. |
| Type O types are commonly affected with hypothyroidism, high stomach acid |
| (leading to ulcers), and thinner blood with greater resistance to blood clotting. |
| Peter D'Adamo proposes that lectins cause agglutination (clotting) of blood cells in an individual with |
| the wrong blood type, and which in turn may create serious liver or kidney problems as visible under a |
| microscope (lectins are sugar-containing proteins found on the surface of some foods that may cause |
| various molecules and some types of cells to stick together). |
| He theorizes further that elevated urine indican levels - prevalent in many gastrointestinal diseases such |
| as celiac disease, diverticulitis, pancreatic insufficiency, inflammatory bowel diseases and others - can |
| also be attributed to specific blood types affecting the interactions of foods with intestinal bacteria, and |
| creating polyamine abnormalities. |
| In addition, different blood types - according to P. D'Adamo - affect the body's secretory performance |
| in respect to digestive juices, whereby a blood Type O for instance is capable of producing higher than |
| average stomach acid levels, which could lead to a greater incidence of gastric ulcers. |
| How do different Blood Types compare to various medical conditions? |
| There are some known blood type / disease - risk associations, where for instance Type O individuals |
| have a marginally higher incidence of ulcers / H. Pylori infections compared to Type A, with pernicious |
| anemia, diabetes, or certain types of cancer being more prevalent with Type A or B. |
| A 2009 Boston study confirmed findings from several decades earlier which suggested a blood type - |
| malignancy risk association, whereby the chances of developing pancreatic cancer for instance were |
| 32% higher for those with Type A blood, 51% greater for Type A-B, and 72% higher for Type B blood. |
| Types O and B also have greater susceptibility to infectious diseases such as scarlet fever, cholera, |
| typhoid, or the bubonic plague, while Type A shows greater susceptibility to the smallpox virus, and it is |
| more prone to blood clotting. Blood-sucking insects (that carry diseases) prefer Type O blood. |
| How does that help doctors and their patients? |
| Unfortunately, it doesn't. For instance, gastritis modestly prevails in blood groups A and O, so with |
| more than 80% of the world population being part of the A or O group, not only would it be impractical |
| or pointless to suggest dietary changes for preventative or therapeutic purposes, but what should the |
| recommendations be? Since there is such a wide variety of possible causes for gastritis, there are |
| no universal therapeutic or dietary solutions that can be safely applied to such a large percentage of |
| the population. The same circumstances apply when trying to formulate diets around blood types for |
| any other medical disorders, as not one single disease is exclusive to one particular blood type. |
| Ever since first becoming aware of the "eat-right-for-your-type" proposition, I was as curious and |
| intrigued as many other researchers and practitioners to clinically apply those theories by comparing |
| patients' blood types to their medical disorders - looking for trends or a pattern. |
| It quickly became apparent that high blood sugar, high blood pressure, or high stomach acid types |
| shared the same blood groups with those exhibiting low blood sugar, low blood pressure, or low |
| stomach acid. As expected, the same applied to people with a lifelong tendency for weight gain, weight loss, nearsightedness, farsightedness..., as well as other "hyper" versus "hypo" conditions, |
| so at this time, blood types don't serve as a helpful screening method. |
| How do different Blood Types compare to a patient's chemical / nutritional profile? |
| Since the "eat-right-4-your-type" concept mainly focuses on dietary lifestyles being matched to blood groups, it would stand to reason that blood types should match the chemical and nutritional profiles of |
| an individual - sort of like the Metabolic Typing of patients - where diets are adjusted according to someone's biochemical or genetic make-up. |
| Unfortunately, there is no practical or clinical match whatsoever - just like eye color and hair color |
| are not a practical or clinical indication of a person's present or future medical risks (other than those |
| with blue eyes or red hair being more prone for sun damage). Years ago, plotting the Biorhythm of an |
| individual was another popular concept that had its followers track someone's physical, intellectual and emotional well-being (to identify critical days), although this method equally lacked scientific support. |
| =================================================================== |
| |
| Blood Groups:Type OType AType BType AB |
| |
| Global Distribution: 62 % 21 % 16 % 1 % |
| |
| Europe: 45 % 42 % 10 % 3 % |
| |
| Africa: 68 % 17 % 12 % 3 % |
| Arabia: 34 % 31 % 29 % 6 % |
| East Asia: 32 % 30 % 28 % 10 % |
| India: 37 % 22 % 33 % 8 % |
| |
| America (US): 46 % 40 % 10 % 4 % |
| American Natives: 98 % 1.7 % 0.3 % 0 % |
| Australian Aboriginals: 69 % 30 % 1.0 % 0 % |
| |
| =================================================================== |
| Of course there are people who claim that since following the "eat-right-4-your-type'' recommendations |
| they had lost some weight, or otherwise felt better, however when asked about any specific changes made, they invariably consisted of lifestyle changes that are universally considered to be beneficial - regardless of someone's blood type - such as cutting out junk food, and/or eliminating foods which |
| either cause, or have an unfavorable impact on specific medical problems one is suffering from. |
| The decision to increase certain foods, or to eliminate food sources that someone has an intolerance |
| or allergy to (dairy, wheat, eggs, meat, nuts, seafood, certain fruits or vegetables...) will definitely have |
| a positive impact on someone's health and is clinically necessary and important, but the need to do so |
| has mostly a genetic basis that is not related blood types A, AB, B, or O. |
| Some patients' medical complaints improve, or completely clear up after avoiding dairy products, or |
| other suspect foods such as wheat, shellfish, nuts, etc., however this happens with all blood types - not just certain blood groups as claimed by "eat-right-4-your-blood type" proponents - so subsequently |
| this does not support, but rather discredit the "Blood Type Diet" concept. |
| The notion that individuals with certain blood types suffer from specific medical problems (i.e. "Type O |
| is commonly affected with hypothyroidism, high stomach acid [leading to ulcers], and thinner blood...") |
| is clinically incorrect. Many medical conditions develop from non-dietary causes and change over a |
| lifetime, but would have to remain fixed according to the premises of the "Blood Type Diet." |
| Fluctuating nutritional requirements as a result of aging also invalidate "eat-right-4-your-blood type" |
| concepts, where a blood group-specific lifestyle is supposed to be maintained throughout a lifetime. |
| For instance, a lot of changes take place post middle age. Along with the usual hormonal slowdown, |
| an individual's stomach acid, potassium, or zinc levels frequently decline, while phosphorus and/or sodium levels tend to increase - independent of dietary intake or blood type. |
| These chemical changes may result in elevated blood sugar, water retention, or high blood pressure, |
| and despite being Type O, may require a reduced intake of meat and other phosphate sources, and |
| a higher intake of dietary or supplemental potassium and zinc. One could consider another Type O |
| individual who has been enjoying and tolerating a high protein (red meat) diet all his life, and who eats |
| E.Coli-contaminated hamburger, ending up with kidney damage. Obviously, his blood type is still Type |
| O, but unless he changes more to a "Type A Diet" now (more fruits, oxalate-free vegetables, low purine |
| diet), he will either soon encounter his first gout attack, or worse, he'll be soon on dialysis. |
| In a Type O female who was previously hypo-thyroid (supposedly being prevalent with Type O), the menopause-related hormonal changes now trigger hyper-thyroidism as a result of naturally declining |
| estrogen and manganese levels. To continue thyroid-stimulating strategies as per "blood type diet / |
| eat right 4 your type" guidelines in this and other countless examples, instead of following proper |
| medical procedure, could have disastrous consequences. |
| =========================================================== |
| |
| Blood Types don't change, so recommended Diets according to the |
| "Eat right 4 your Type / Blood Type Diet" concept remain fixed and |
| don't change either, however many medical conditions change over |
| a lifetime, and as a result require a change in medications and Diet. |
| |
| =========================================================== |
| Now when considering the proposed link between Type O and higher stomach acid levels -- it would |
| certainly help if the people who come up with these novel ideas actually took the time and measured |
| stomach acid levels in those with different blood groups so they could speak from experience instead |
| of simply making things up while writing a book. Not only are high and low stomach acid levels found with every blood type, but low levels commonly outnumber high levels, with Type O being no exception. |
| At the same time, the question of whether someone is better off following a mostly vegetarian - rather |
| than a mixed diet, should be equally based on an individual's biochemical make-up or organ functions |
| - which are ultimately affected by any such diet - rather than on blood types (where Type A is supposed |
| to avoid animal products). There is nothing worse than seeing a protein-starved, iron-deficient, and anemic patient who was made to believe that following some ancestral, prehistoric diet outlined in a |
| book would resolve all of one's medical complaints. |
| Health problems are not predetermined by blood types; only the reduced resistance to some diseases |
| can at times be attributed to a particular blood group. The ultimate Achilles heel of the Blood Type Diet lies in the fact that most medical conditions have a genetic basis that can be equally affected by trauma, pathogens, medications, toxic exposure, and many other factors. This alone would quickly negate Peter D'Adamo's "eat-right-4-your-type" proposition if at birth, his blood type hypothesis was indeed valid. |
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