Studies have refuted the effectiveness of the blood type diet

A new study found that a person's blood type does not affect weight loss or cardiometabolic health in response to dietary changes. The blood type diet gained popularity in the mid-1990s with the suggestion of naturopath Peter D'Adamo. It is based on the postulate that certain foods have a different effect on the body, depending on the person's blood group.

For example, group I is considered the most ancient, it was possessed by our distant ancestors, whose diet consisted of food with a high content of animal proteins. On the contrary, type II is considered a later group, when ancient people have already mastered agriculture, therefore vegetarianism with a minimum of red meat is suitable for it. D'Adamo's book "Eat Right for Your Type" once sold millions of copies, and remains popular to this day. However, no scientific evidence has been presented to support the diet since its inception.

The last rebuttal came from an experiment with 244 overweight participants. They were randomly divided into 2 groups - one adhered to a vegan diet for 16 weeks, the second did not have any changes in the diet. Bottom Line: A plant-based diet speeds up metabolism by 20%, leading to increased insulin sensitivity and weight loss. The same cannot be said about the control group.

The effect of the diet based on the blood group of the participants was studied for a second time. If her recommendations were correct, a plant-based diet would have been more effective for half of the subjects with blood group II and less for group I. In addition to the obvious indicator of weight loss, blood lipids and glycemic balance were considered to assess the overall health of the body. No difference was found in the parameters of the subjects.

The researchers concluded that all blood types benefit equally from a vegan diet based on fruits and vegetables, legumes and whole grains. These studies were published in the Journal of the Academy of Nutrition and Dietetics.