We can no longer count the number of diets touting guaranteed, rapid and lasting weight loss. One of them, the blood group diet, involves change the content of their plate according to their blood type in order to lose weight: people in group A are encouraged to eat more foods of plant origin, while a diet rich in meat is recommended for people in group O.
Published this December 4 in the Journal of the Academy of Nutrition and Dietetics, a new study demystifies this diet and shows that the blood type has nothing to do with the benefits seen when you eat more foods of plant origin.
This study was conducted using data from other studies published in the JAMA Network Open last November 30. 3,115 overweight people with no history of diabetes were randomly assigned to two groups, one consisting of a low-fat, vegan diet for 16 weeks, while the other, the control group, did underwent no change in diet. Of course, experience has shown that the vegan diet had sped up the metabolism of the participants, with an increase in calorie consumption after meals of 18.7% on average for the group affiliated to the vegan diet compared to the control group.
After collecting data about the blood types of participants on the vegan diet, the researchers found that blood type made no difference in weight loss, the level of lipids in the blood and blood sugar. In other words, people with blood type A did not get more benefit from this diet than those with group O, contrary to what the “blood group diet” suggests.
“While the diet [en fonction du] blood group says a plant-based diet should be better for blood group A and worse for blood group O, it turned out beneficial for all people regardless of their blood type, and there was no evidence that meat diets are good for everyone“Commented Neal Barnard, lead author of the study and chairman of the Physicians’ Committee for Responsible Medicine (“Physicians Committee for Responsible Medicine”).
“Our research shows that all blood groups benefit from a vegan diet based on the consumption of fruits and vegetables, legumes and whole grains, when we look specifically at weight loss and cardiometabolic health in adults by overweight ”, concluded the researcher.