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Popular blood type diet debunked

Researchers from the University of Toronto (U of T) have found that the theory behind the popular blood type diet–which claims an individual’s nutritional needs vary by blood type–is not valid. The findings are published in PLoS One.

“Based on the data of 1,455 study participants, we found no evidence to support the ‘blood-type’ diet theory,” said the senior author of the study, Dr. Ahmed El-Sohemy, Associate Professor and Canada Research Chair in Nutrigenomics at the U of T.

“The way an individual responds to any one of these diets has absolutely nothing to do with their blood type and has everything to do with their ability to stick to a sensible vegetarian or low-carbohydrate diet,” said El-Sohemy.

Researchers found that the associations they observed between each of the four blood-type (A, B, AB, O) diets and the markers of health are independent of the person’s blood type.

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