Insulin from porcine pancreas is a naturally extracted polypeptide hormone used primarily as a reagent in biochemical, pharmacological, and physiological research. It is employed in studies of glucose metabolism, insulin signaling pathways, and diabetes models due to its close structural similarity to human insulin (differing by a single amino acid). This product serves as a reference standard for insulin potency assays, ELISA kits, and bioactivity testing. It is also utilized in cell culture media to stimulate growth in insulin-dependent cell lines and in the development of insulin analogs or delivery systems. Supplied as a white to off-white powder with high purity and specified zinc content, it is suitable for laboratory applications but not intended for direct therapeutic use in humans.