Eating Disorders is a heterogeneous group of syndromes which includes many factors in their develop. The three main syndromes, AN, BN and EDNOS has been defined in last DSM as independent entities. However is well known that a group of patients may change its presentation along time, so also been at first diagnosed of AN, lately will fulfil criteria for BN or EDNOS.

In the other hand, if we compare two patients with the same syndrome, as BN, or AN…

We may easily find big differences in personality, stressors…and in some cases the only common factor is the clinical presentation.

Behind all of this is the fact that syndromic classification drives to empiric treatments that are far the most validated.

But although there is a well known evolution in this disorders, with a not so bad income as one could think initially (in some cases one third could recover without treatment), what may we do with those patients that are resistant for empiric treatments?

And it is our opinion that a deeper knowledge of all the factors that contribute to the syndrome or its presentation, as well as those related to treatments results, should be taken into account.

We have reviewed all knowledge about these issues and we have completed it with our clinical practise using a 50 patients data base, here we will show our results, that are basically that even the same factors interact in different ways in each patient, so it is not just the ingredients but the recipe.