Tests and procedures - all patients with Nutritional Insufficiency/Eating Disorders admitted to the Cleveland Clinic Children's Hospital follow the Nutritional Insufficiency Protocol, with all screening tests and inpatient evaluation and follow-up occurring regardless of whether they are involved in the current pilot study. As per protocol, these patients will be on strict bed rest with a 24 hour companion supervising the patient at all times, especially monitoring intake and timing of completion of all meals, snacks and/or supplements. It is also standard per protocol that they receive Neutra-phos which is a potassium phosphate and sodium phosphate supplement, twice daily for the initial 5 days of treatment. The screening, daily inpatient evaluation, and study questionnaire distribution will be completed on admission, every 3 days, and at discharge