The numerous studies concerning the efficiency of diets would be to set with a lot of recession. One specialist American analyzed 230 ! And according to her the characteristics of the participants would not enough be taken into account.

Where from biaisés results. Pr Cheryl Gibson of the university of Kansas in the United States is formal! " In about 90 % of the considered works, there is simply no precise description of the studied subjects ". Major information is thus missing.

" Our results show that in 92 % of the studies, the consumption of medicines of the participants is not known. In a work on three, the health is not mentioned ". But it is not everything. The authors of a study on ten omit for example to clarify the age of the considered subjects! So many essential parameters to guarantee the scientific aptness of a study.

" In these conditions, it is impossible to advise to make such or such diet. We are in the incapacity to establish general recommendations in the material ". While the season of both details on track approaches and while number of special numbers goes out which aspire to learn us to make look slimmer, here is precision which were imperative !