HCG 5000 IU is a research-grade human chorionic gonadotropin (HCG) glycoprotein hormone prepared for laboratory investigations involving luteinizing hormone (LH) receptor biology, endocrine signaling, steroidogenic pathways, receptor activation, and molecular pharmacology. Every batch undergoes rigorous analytical verification to support purity, consistency, and reproducibility for endocrine, biochemical, and receptor biology research.