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Eliminating refined grains and sugar baked goods alone may lead to improved health and weight loss without the complicated food prescriptions for many.Īs far as exercise is concerned, while his explanation is interesting, I'm not convinced of his argument. The O diet also eliminates wheat gluten, which limits a great deal of the unhealthy, processed foods that cause inflammation and weight gain. I certainly agree this is healthier, but this can be expensive, and I'm concerned that if people eat the recommended amounts of red meat and cannot afford organic, grass-fed beef and chicken and wild fish, this diet could negatively affect their health and could increase their risk of heart disease and cancer. Also, for the O type diet, D'Adamo states in his book that the success "depends on your use of lean, chemical-free meats, poultry and fish." The suggested weight loss versions of the diet, particularly for type O, would not be healthy and balanced. While I think that all of the diets, with some effort, planning and modification (less red meat), could be relatively healthy and reasonably balanced (they all recommend ample amounts of fresh fruits and vegetables, which most Americans should be eating more of), I think the diets are complicated, not practical in some cases (some foods are hard to find and unfamiliar to the average person), and can be challenging (for example if families are made up of numerous blood types). I believe that the huge increase in processed food, food additives, chemically and genetically modified food, and fast-food consumption in this country are likely far more of the culprit in both poor health and weight gain for most people than blood-type associated food responses.
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This may be a contributing factor in some cases, but I think D'Adamo would agree that there is more to the story. That being said, I'm not convinced that lectin and blood type are the answer. In addition, I think we are seeing an increase in food allergies, intolerances and inflammatory-related diseases, so looking more carefully at specific foods which certain people may be responding poorly to is a good idea.įood intolerance/allergy testing is expensive and in most cases not completely reliable so doing a diet elimination trial for certain foods is a reasonable and economical approach. I commend D'Adamo for recognizing this fact. I think it is critical to realize that there is no one-size-fits-all approach to dieting for optimal health and weight loss. The B type diet is more varied and encourages moderate exercise, and the AB diet is a blend of type A and B.
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The type A diet, the second most common blood type, is a low-fat vegetarian diet that encourages gentle exercise such as yoga and golf. The diet for type O, the most common blood type, is a high-protein diet that limits wheat and encourages vigorous exercise. The more symptoms you have that are potentially associated with diet, especially gastrointestinal and food allergy-type symptoms (diarrhea, bloating, fatigue), the more closely you should follow your recommended way of eating. He suggests trying it for several months to see if you benefit. His approach also involves four unique approaches to exercise based on your blood type, citing differing responses to stress based on your blood type.ĭ'Adamo notes that in his experience, eight out of 10 people report satisfaction with the diet, with the predominant benefits revolving around gut health, immune health (fewer infections) and weight loss. He recommends easing into it and essentially following it as strictly as necessary for your particular health concern, allowing for even more individual variability in his dietary approach. You don't have to follow his diet perfectly, he notes. Adopting the proper diet for your blood type, according to D'Adamo, can lead to weight loss if you follow a lower calorie version, but to maintain the health benefits, the diet must be followed for good. This is not so much a diet but rather a lifestyle. In addition, he believes that there are differences in our body chemistries based on blood type that determine what foods we digest optimally. If you eat foods to which you react adversely, the negative response (which includes inflammation) can trigger different diseases based on your blood type as well as fatigue, poor digestion and weight gain. D'Adamo, who is a naturopathic doctor, to get his explanation.ĭ'Adamo believes that based on your blood type, you react differently to substances called lectins, which are present on the surface of most foods. I get asked about this diet quite often so I decided to do a little bit more research on the topic and go straight to the author, Peter J.