The invention provides methods of treatment that induce satiety in a subject for a period of at least around twenty-four hours by once-daily administration to the subject of a controlled release dosage form, wherein the dosage form is administered while the subject is in the fasted state and at a time of around six to around nine hours prior to the subject's next intended meal, and wherein the dosage form comprises a controlled release composition, which comprises an enterically-coated, ileum hormone-stimulating amount of a nutritional substance and releases the majority of the nutritional substance in vivo upon reaching the subject's ileum. The invention also provides a diagnostic tool for probing the health and disease state of the ileal hormones, excess or deficiencies. The invention provides a safe vehicle for targeted deliveries of chemical, pharmaceuticals, natural substances and nutrition to the ileum. The present invention also provides a method for treating noninsulin dependent diabetes mellitus, pre-diabetic symptoms, and insulin resistance, as well as a number of disease states and conditions including gastrointestinal disorders as otherwise described herein.
