Blood Type Diet: Scientific Evidence Is Still Lacking

Can following or not following a particular diet, based on our blood type, affect our state of health, increasing or reducing the risk of disease?

The answer is yes for the numerous schools of thought that consider "natural" the connection between blood type, blood pH and ingested nutrients.

The answer of science at the moment, however, is No. The American Journal of Clinical Nutrition recently published the results of a comparative study conducted in Belgium precisely on the scientific publications relating to the so-called "blood type diets".

Numerous information sources were examined for a total of 16 articles found on the subject, of which, however, only one could be considered usable on the basis of the rigorous evaluation and reliability criteria applied by the researchers.

The study examined presented itself as scientifically sound, since it examined the responses in the variation of "bad" LDL cholesterol among subjects belonging to different blood types who followed a diet very low in fats.
The Belgian team likewise excluded this study too, considering it not directly responsive to the question that we wanted to put forward again at the opening of this brief commentary.

The merit of this comparative and re-analysis study conducted in Belgium, although it did not arrive at a conclusion, is that of having rekindled attention to dietary models, too often taken as dogma by patients who soon become followers and adherents.

Secondly, certainly not in order of importance, one cannot overlook the merit of having marked the way by outlining the method of analysis that makes it possible to answer the question posed at the beginning of this post.
It would suffice to compare the results extracted from a procedure that sets in parallel a test group (experimental) of individuals of a given blood type treated with a "blood type" diet and a second group (control) of the same blood type that will instead be treated with a traditional diet.

(editor's note) This also appears to us to be the only method, with reasonably sustainable cost and time, that would make it possible to dispel the numerous doubts that are fed around this dietary model and at the same time to reassure, one way or another, those individuals who choose to follow a particular dietary regimen and who, for their own health and well-being, would deserve to be able to enjoy scientifically grounded information in order to share their choice with a nutrition professional or on their own.