VIP 1-28 (Vasoactive Intestinal Peptide, full 28-residue form) is a neuropeptide studied in neuroscience, immunology and gut-brain research. It is supplied as a high-purity white lyophilized powder, >=99% by HPLC, in sealed vials for laboratory use. VIP 1-28 is investigated in research on neuropeptide signaling, inflammation, vasodilation and autonomic regulation, and is commonly applied in cell-based and preclinical studies. The lyophilized presentation provides good stability and reproducible reconstitution for consistent experimental dosing. We maintain strict quality control across batches and provide COA for specific batches on request. The unopened product should be stored sealed at 2-8 degree C, protected from light and moisture; for long-term storage keep at -20 degree C and avoid repeated thawing. Small and large orders are accepted, and OEM, private-label and discreet neutral-packaging services are available with worldwide delivery. Laboratory research use only, not for human or veterinary purposes.