This study tries to examine the factors affecting nutrition disorders among postgraduate students of Ferdowsi University of Mashhad. The data was analyzed through survey method and optimal stratified sampling, and multiple and logistic regression with the sample size of 260 girl students of postgraduate levels. The results show that eating disorders mean is 2.22 out of 5 which is less than average. Also 28% of the sample population suffers from nutrition disorders. Body image, pressure of norms by men, pressure of norms by the worldwide media (satellite TV, internet), social acceptance of the body, and appearance management have positive and significant relations and correlations with nutrition disorders. Finally the two variables of social acceptance and body image as factors affecting nutrition disorders formed 53% of dependant variables in regression model. All in all the findings indicate that social variables are important factors for eating disorders.