Modern civilization: The blending of Type A and Type B blood types resulted in the appearance of the Type AB blood type.
Dr. D'Adamo has studied the physiological effects of substances called lectins. Lectins are proteins found in many commonly eaten foods, particularly the seeds of leguminous plants. They can be absorbed intact from the digestive tract into the bloodstream.
According to Dr. D'Adamo, certain lectins are incompatible with certain blood types. This incompatibility causes the lectin to attract and clump red blood cells. He calls this process agglutination.
According to Dr. D'Adamo, lectin-caused agglutination is the primary cause of many common health complaints. He has tested most common foods for blood-type reactions. Based on this study, he developed a food list that allow people to avoid eating foods containing lectins that are incompatible with their blood type.
The Blood Type Diet divides foods into 16 categories:
Meats and poultry
Dairy and eggs
Oils and fats
Nuts and seeds
Beans and legumes
Breads and muffins
Grains and pasta
Juices and fluids
Foods in these categories are then labeled as "highly beneficial," "neutral," or "avoid" according to each of the four blood types.
Here is a summary of recommendations for various blood types by Dr.
· Emphasize animal proteins
· Focus on anger management
· Engage in aerobic exercise to reduce stress
· Control Type O impulsive behavior
· As you age, vigorous exercise is crucial
· Emphasize vegetables
· Concentrate on stress management
· Engage in yoga or gentle exercise to reduce stress
· Take naps or frequent breaks to stay focused
· As you age, a regular sleep cycle is crucial to keep your health in balance
· Vary your diet
· Focus on creative outlets
· Engage in walking and meditation to reduce stress
· Avoid emotional overreaction
· Mental activities are crucial to retaining memory as you age
· Eat smaller, more frequent meals
· Focus on cultivating your natural spiritual tendencies
· Break up your day with physical activity to feel more energized
· Avoid feelings of isolation
· Be aware of your environment as you age, to avoid susceptibility to bacterial infections
Many people follow this diet to improve their overall level of health. Although weight management is not the focus of the diet, Dr. D'Adamo believes that weight loss is a natural consequence of following a diet tailored to your blood type.
This plan is unrealistic if members of one family have different blood types, causing them to each follow a completely different diet. Each plan unnecessarily eliminates specific groups of foods, which can result in nutrient deficiency.
Some physicians and nutritionists argue that Dr. D'Adamo's theory about lectins lacks solid scientific support. These critics point out that the research that has been done on lectins has been performed mostly in test tubes. Therefore, it is not yet known what, if any, physiological effects lectins have in humans. Furthermore, many food lectins are destroyed by cooking and/or digestive enzymes, so many critics argue that the number of lectins absorbed intact through the digestive system is minimal.
Other critics point out that Dr. D'Adamo's emphasis on the ABO blood-typing system is somewhat arbitrary. It is only one of many different blood-typing methods, and to date, more than 30 unique markers have been identified on the surface of red blood cells.
The literature finds very small differences in heart disease rates and other
diseases from one blood type to another. The Framingham Heart Study found no significant difference between the incidence of heart disease and
Opponents caution that people with Type O blood may increase their risk of heart disease by adhering to Dr. D'Adamo's Type O diet recommendations.
Critics say that this diet is really a calorie-restricted diet. As with any other low calorie diet, weight loss is likely to occur so long you
follow the diet with restricted calories.
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