HCG

"Our reproductive endocrinology lab at an institutional research lab has been using LyzeLabs HCG for LHCGR and steroidogenesis research for 11 months. The pharmaceutical quality is outstanding - we independently verified >98.6% purity via HPLC and mass spec confirmed the intact α-β heterodimer with proper glycosylation (molecular weight 38.2 kDa matching glycosylated HCG). Our research investigates HCG's LH-mimetic steroidogenic effects - primary rat Leydig cell bioassays show dose-dependent testosterone production (LC-MS/MS quantification) with EC50 ~0.8 nM comparable to recombinant LH, confirming full LHCGR activation. We measured cAMP accumulation demonstrating robust Gs-coupled signaling, and StAR protein Western blots show HCG-induced upregulation at 2-6h validating steroidogenesis initiation. The extended half-life enables sustained testosterone elevation over 48-72h in our rodent studies (single HCG dose) vs pulsatile native LH requiring repeated administration. Comparative studies show HCG's steroidogenic potency matches recombinant LH but with >40-fold longer duration from glycosylation-mediated clearance resistance. Desensitization experiments demonstrate chronic HCG exposure (7-14 days) downregulates LHCGR expression and reduces testosterone responsiveness - validating gonadotropin tolerance mechanisms. The G5K and G10K specifications support our dose-response and chronic stimulation protocols perfectly. Delivery to Berlin takes 10-12 days with cold-chain packaging. This is premier LH analog for gonadotropin research internationally."

2025-11-15

"Matched the listing and the certificate. Ten days to arrive."

2025-11-12

"Dependable for routine reference work. Reordered because it stayed put."

2025-11-09