Desulfated caerulein, an analog of the naturally occurring peptide, is used in research to stimulate gastrointestinal motility and secretion, often as a tool to investigate gut hormone function and smooth muscle contraction. It acts as a cholecystokinin (CCK) receptor agonist, mimicking the effects of endogenous CCK and gastrin-releasing peptide, though typically with reduced potency compared to the sulfated form due to the absence of the sulfate group. Employed in animal studies to induce pancreatitis or study pancreatic exocrine function. Also utilized in veterinary medicine to promote gastric emptying and intestinal transit in certain clinical conditions.