: The objective of this research project will be to determine the sphingolipidomic profile in a group of women (\> 18 years) affected by Anorexia Nervosa (AN), phenotypically characterized (restricting \[AN-R\] vs binge-eating purging \[AN-BP\]). Specific questionnaires will be administered for the definition of the severity of the eating disorder and depressive state (suicidality), to which will be added the evaluation of gonadal function (i.e., plasma levels of estradiol/progesterone and use of oral contraceptives). Based on the specific lipidomic profile, which the present research project hopes to characterize, it will be possible to appropriately modify the diet of rehabilitation programs and, in the future, improve the effectiveness of the treatment itself, especially in the long term.