GLP-2 (1-33) is a naturally occurring peptide which is important in controlling the function of the intestine. In previous studies our group has shown that serum levels of GLP-2 correlate with intestinal function in human neonates. Low levels of GLP-2 are predictive of intestinal malabsorption and the development of the so called "Short Bowel Syndrome". GLP-2 has been shown to be specifically trophic for the GI tract, especially for the small intestine.