The Blood Type Diet Is Only A Myth?

By | July 23, 2018

There are many types of diets that you can do to lose weight. Starting from healthy ones to diets that are extreme. There are also different types of diets that are based on certain things like blood type.

The Blood Type Diet

The blood type diet is a nutritional diet advocated by Peter J. D’Adamo, outlined in his book Eat Right 4 Your Type. D’Adamo claims that ABO blood type is the most important factor in determining a healthy diet and recommends distinct diets for each blood type.

Throughout his books, D’Adamo cites the works of biochemists and glycobiologists who have researched blood groups, claiming or implying that their research supports this theory. The consensus among dietitians, physicians, and scientists is that the theory is unsupported by scientific evidence.

What you should eat

Are you not familiar with this type of diet, well according to WebMD here is a list of foods that should be eaten based on your blood type:

Type O blood: A high-protein diet heavy on lean meat, poultry, fish, and vegetables, and light on grains, beans, and dairy. D’Adamo also recommends various supplements to help with tummy troubles and other issues he says people with type O tend to have.

Type A blood: A meat-free diet based on fruits and vegetables, beans and legumes, and whole grains — ideally, organic and fresh, because D’Adamo says people with type A blood have a sensitive immune system.

Type B blood: Avoid corn, wheat, buckwheat, lentils, tomatoes, peanuts, and sesame seeds. Chicken is also problematic, D’Adamo says. He encourages eating green vegetables, eggs, certain meats, and low-fat dairy.

Type AB blood: Foods to focus on include tofu, seafood, dairy, and green vegetables. He says people with type AB blood tend to have low stomach acid. Avoid caffeine, alcohol, and smoked or cured meats.

Blood type diet is just a myth?

A study showed that there is no strong evidence that this kind of diet can lose weight or have health benefits.

Researchers observed thousands of papers and research on the blood type diet, but none of the studies showed the definite link between blood type diet with increased health or weight loss. Researchers concluded that there was no evidence to indicate with certainty that blood type diet is beneficial for health.

According to Janet Brill, R.D., Ph.D., a consultant in private practice and author of Cholesterol Down, and Nicolette Pace, R.D., CDE, whether you’re A, B, A/B, or O, the theory goes that depending on your blood type, you should adhere to one of four possible eating plans: low carb/high protein, low fat, vegetarian, or just an overall balanced diet. The reasoning is based on biochemistry and evolutionary theory and, according to both Pace and Brill, has no scientific proof whatsoever.

“Blood type has to do with receptors on red blood cells and doesn’t dictate what you should or shouldn’t eat,” Brill says. If you match your diet to one of the blood type plans and lose weight, the reason is that of a sudden change to your diet or drop in calories, not because you’re a universal donor.

Lack of clinical trials

The blood type diet has been criticized for its lack of support by clinical trials. In Eat Right 4 Your Type, D’Adamo mentions the diets being in the eighth year of a 10 year cancer trial:

I am beginning the eighth year of a ten year trial on reproductive cancers, using the Blood Type Diets. My results are encouraging. So far, the women in my trial have double the survival rate published by the American Cancer Society. By the time I release the results in another 2 years, I expect to make it scientifically demonstrable that the Blood Type Diet plays a role in cancer remission.

However, the results of this trial have never been published. In his book Arthritis: Fight It With the Blood type Diet, D’Adamo mentions an impending clinical trial of the blood type diet to determine its effects on the outcomes of patients with rheumatoid arthritis, but the results of this 12 week trial have also never been published. A study published 16 and 7 years, respectively, after the books turned up no published results of any such trials.

Some studies have found links between blood type and risk for developing blood clots or certain cancers, of having a heart attack and of hemorrhaging when infected with Dengue fever.

But no peer-reviewed research has indicated that eating foods supposedly compatible with one’s blood type will improve health or induce weight loss more than a general diet plan.
The results of this study get a response from an author of a special blood type diet book. He said that there is a scientific basis underlying blood type diet, and this can be proven in a proper way. Meanwhile, efforts to prove that blood type diet is beneficial still exist until today.