The Blood Type diet
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Be aware: this is only the goal of this diet, not necessarily its outcome. Results vary from person to person. Consult your doctor or dietician before starting this (or any other) diet.
The Blood Type Diet was invented by Peter D'Adamo. He states that what food is best for you depends on your blood type. This is based on the idea that different blood types digest lectins differently and that the immune system reacts differently to different blood types.
On the homepage you can compare this diet with other diets.
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The diet discusses four blood types, namely type A, B, AB and type O. A separate diet is advised for each blood type.
D'Adamo states that people with this blood type have a sensitive immune system. Fruits, vegetables, beans, legumes and wholemeal products are recommended for this blood type. Tomatoes, aubergines, chickpeas and lima beans are not recommended. Furthermore, the diet should be meat-free.
As for sports, Yoga and Tai Chi are recommended. Meditation is also said to be good for this type.
D'Adamo advises people with this type of blood not to eat maize, wheat, peanuts, lentils, sesame seeds, tomatoes and buckwheat. These products are thought to contribute to weight gain, because of their effects on digestion. Chicken is also not recommended. Instead, rabbit, goat and lamb are advised. Green vegetables, eggs and low-fat dairy products are also among the recommended options.
In terms of exercise, activities that are both mentally and physically challenging are advised. Tennis, golf and martial arts are given as examples here.
D'Adamo says that people with this blood type should avoid caffeine and alcohol. Smoked meat, chicken, corn, banana and broad beans are also not recommended. Instead, tofu, seafood, dairy products and green vegetables are on the menu.
Type AB would benefit most from a combination of gentle and vigorous activities, such as running a few times a week and doing yoga or Tai Chi a few times a week, according to the inventors of this diet.
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For this type, D'Adamo recommends a high-protein diet with plenty of lean meat, poultry, fish, fruits and vegetables. Wheat, dairy products, caffeine and alcohol should be avoided.
As for sports, regular (3-4 times a week) exercise is advised. Running and cycling are mentioned as examples.
Consult your doctor or dietician before starting this (or any) diet, especially if you have a chronic condition, high blood pressure or elevated cholesterol.
An example of another diet that gives advice based on a physical feature is the Body Type diet.
In the book 'The Blood Type Diet' you can read more on this diet. There are also separate books for Type A, Type B, Type AB and Type O.
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Depends on the blood type
As a dietician, I do not work with the blood group diet. I am not in favour of simply eliminating certain foods from a diet. This can create a one-sided diet resulting in deficiencies. I also question the scientific aspect of this diet.
Any diet where you say not to eat things to lose weight will help you lose weight, simply because you are going to omit products and thus kcal. I think the advice is contradictory in itself, if you eat rabbit instead of chicken, for instance, you still get animal proteins and fats. Or e.g. in type b, "In terms of exercise, activities that are both mentally and physically challenging are recommended. Tennis, golf and martial arts are given as examples", which is very broad in the sense of as long as you exercise.
With the professional help of a dietitian it should be easier to reach your goals. Please contact a dietician in your area or talk to a doctor before starting any diet.
Please take note that most diets do not have a scientific basis.
Consult your doctor or dietician before starting a diet, especially if you have a chronic condition like diabetes, cardiovascular disease, lung disease or kidney disease.
If you think you might have an eating disorder (like anorexia or bulimia), it is important to look for professional help. Contact your (house) doctor or find help elsewhere. Here you can find a list of several websites that can provide (online) help. These sites also provide information for people that know someone with an eating disorder.