Orexin A (hypocretin-1) is a 33-amino-acid neuropeptide produced in the lateral hypothalamus that activates OX1 and OX2 receptors to regulate wakefulness, feeding behavior, energy balance and reward processing in research models. It is supplied as a high-purity white lyophilized powder at >=99% HPLC purity in sealed vials, offering good stability and simple reconstitution. It is used in sleep research, narcolepsy studies, appetite-regulation experiments and neuropharmacology assays on orexin signaling. Each batch is manufactured under controlled quality systems and batch-specific certificates of analysis are obtainable on request. Store the sealed vial at 2-8 degree C away from direct light and humidity; for extended storage keep at -20 degree C and minimize freeze-thaw cycles. Small sample orders and bulk quantities are both welcomed, and we provide OEM, private-label and secure neutral-packaging services for global delivery. Laboratory research use only.