Therapeutics based on peptides show promise in the treatment of conditions such as diabetes, cancer, and irritable bowel syndrome. Their big size and hydrophilic nature, however, make it difficult to
Octapeptides synthesized from D amino acids were absorbed from the intestine and excreted in urine of normal rats drinking 5% glucose/1% creatinine containing the 125I-labeled peptides at 0.1-25 mg/dl