We explain to you why the “blood type” diet is a bad idea

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Last updated on December 8th, 2022 at 02:39 pm

The “blood group” diet that recommends adapting your diet to your group A, B, AB or O does not actually bring any benefit and is not based on any scientific evidence. Decryption.

Of meat and some cereals for people of group O, little meat but legumes, fruits, and vegetables for those in group A. Among all the schemes in vogue, the regime’s “blood” was the coast. But is it scientifically valid?

The answer is negative according to American researchers from the Committee of Physicians for Responsible Medicine. They publish their work on these diets in the Journal of the Academy of Nutrition and Dietetics on December 4, 2020.

Weight, cholesterol, and blood sugar

This study is based on a clinical trial involving 244 participants. For 16 weeks, half of them ate a low-fat, predominantly vegetarian diet, and the other half – the control group – did not follow any special diet and continued to consume meat.

They measured weight loss or gain, cholesterol, and blood sugar in all participants with one question in mind: Did these factors vary depending on the blood type?

” no difference”

Because according to the principle of the diet depends on the blood group, the vegetarian diet is recommended for people in group A. Participants in group A could therefore have a more beneficial effect to eat vegetarian than others.

Verdict? ” We discovered that the blood type made no difference,” said Dr. Neal Barnad, chairman of the Committee of Physicians and co-author of the study in a statement.

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A diet high in meat, bad for everyone?

” While the blood group diet says that a plant-based diet should be better for blood group A and less for blood group O, it has been shown to be beneficial for people of all blood groups,” says Dr. Barnad.

Worse, ” there is no evidence that a meat-based diet is good for anyone, ” even for people in Group O, adds the doctor.

In short, all blood groups benefit from a diet that relies on the consumption of fruits, vegetables, legumes, and whole grains, both in terms of weight loss, heart health, and metabolism. Indeed, according to this study, vegetarians burn on average 18% more calories than non-vegetarians after a meal. Whether they are, A, B, O, or even AB. 

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