The blood type diet was popularized by Peter J. D’Adamo. The diet starts with a simple hypothesis: that the different blood types represent different evolutionary heritages. The ancestral blood group is type O, and their optimal diet should resemble the high animal protein diet that was typical during the hunter-gatherer era.
There is little scientific evidence that backs up the claims of the blood type diet. But with so many people saying that the diet helped them, why don’t you give it a try? Let’s break down all blood types.
According to the hypothesis of the diet, people with type A blood have emerged with many complex challenges. Their diet is based on utilizing nutrients from carbohydrate sources. You can see those patterns in their digestive structure. According to the author, people with blood type A have trouble digesting and metabolizing animal protein.
The biggest challenge is coping with stress, which is hard for people with type A. People with blood type A flourish on a vegetarian diet. If you want to lose weight easily, just ditch the meat and you’ll notice how much more energy you have. Meat is toxic for people with blood type A. For the sensitive people in this group, staying away from the typical meat and potato diet is crucial to good health.
You need to consume foods in their natural state. That means pure, fresh, and organic ingredients. Dietary adjustments are very crucial for the sensitive immune system of people with blood type A. Changing from carnivore to vegetarian brings a ton of health benefits to the table.
People with blood type B have an interesting connection between their genes and their digestion. According to D’Adamo, people with blood type B originate from the Himalayan area. They’ve adjusted well to the climatic change, which has allowed people in this group to thrive in every condition, especially in changeable conditions. The diet of people with type B blood is a fluid and flexible diet, and they need to find a balance between a carnivore and vegetarian diet (i.e., between meat and vegetables).
It can be challenging to balance between these two worlds, however. What is even more challenging is that people with blood type B produce higher cortisol levels in stressful situations. They are very sensitive to lectins in select foods, which can lead to more diseases.
People with blood type B should avoid corn, lentils, tomatoes, sesame seeds, peanuts, wheat, and buckwheat. These foods can slow down your energy production, resulting in fatigue and fluid retention. Eliminating these foods will regulate your blood sugar levels. Another challenge is avoiding chicken, as this meat is rich in components that are harmful to people with blood type B.
Beneficial foods for this group include goat, lamb, and mutton meat, vegetables, eggs, and low fat dairy.
I said earlier that type O is considered the ancestral group. This was an early, successful formula—a blood type carrying only two opposing blood type antibodies (A and B). Because of that, people with blood type O have a much better immune system. However, you are susceptible to ulcers and thyroid disorders.
The biggest strength of people with type O blood is the ability to digest meals containing both protein and fat. But that’s the downside as well, as you have a challenge processing grains. Simple carbs are easily converted into fats. The major recommendation for people with blood type O is to exercise as much as possible. They thrive when faced with challenging physical exercise.
In terms of food, you are a carnivore (as mentioned previously). That means a diet heavy on lean meat, fish, poultry and vegetables. At the same time, you want to avoid beans, dairy, and grains.
You can say type AB is a genetic puzzle. It’s no surprise that AB is the rarest blood type, with only 5% of the world’s population having this blood type. Unlike other blood type groups, where there are dominant and recessive variations (alleles), in AB, they co-exist.
One of the big recommendations is that you avoid caffeine and alcohol (and that’s even more important in stressful situations). In terms of food, focus on seafood, green vegetables, dairy, and tofu. Seafood is actually the best source of protein for people with blood type AB.
The big challenge is that people with blood type AB have low stomach acid, which makes it troublesome to digest food. Therefore, you should have smaller, but more frequent, meals to counter the low stomach acid. And you should be careful how you combine foods, e.g., protein and starches should not be combined. And you absolutely must avoid smoked and cured meats.
What are the downsides of a blood type diet?
Every diet has its limitations, and the blood type diet is no different in that regard. Each of us knows his blood type. Now it’s just a matter of seeing what the suggestions are for your type.
But here are the limitations of this diet.
- The level of effort is very high.
- It might not be a very restrictive diet at first glance, but the blood type diet is 100% restrictive on certain foods.
- You might need to change your way of cooking. You’re not only changing the foods you eat, but also the way you cook them.
- There is no room for personal taste. You might find out that your favorite foods are just not good for you.
- In terms of exercise, it all comes down to the blood type again. People with blood type A need yoga and similar exercises, while people with blood type O thrive on vigorous aerobic exercises.
- If you are gluten sensitive, you probably won’t be able to follow the diet. This diet does not ban gluten, but if you restrict yourself only to the foods according to your blood type, you’ll find it challenging to stay away from gluten.
- The diet is a bit pricey. Since there are many special and organic foods (like soy milk), you might find it costly.