The state of hepatic GH resistance in anorexia nervosa is further corroborated by the lack of increase in IGF-I following administration of supraphysiological doses of exogenous GH in women with anorexia nervosa (61), and only refeeding appears to able to restore IGF-I levels (56, 59, 62). This evidence concerns the gene GH1 and anorexia nervosa.