rHGH 40IU Pen (10 Pens)

HGH (Somatropin) at a glance

Somatropin is the recombinant form of human growth hormone: a single chain of 191 amino acids folded into a helical bundle and stabilized by disulfide bridges. It is typically expressed in E. coli or mammalian cells and purified to match the main pituitary isoform. The formula is C990H1528N262O300S7, with a mass of about 22.1 kDa. Listings here supply a white lyophilized powder, and it should be handled analytically as a protein rather than a short synthetic peptide.

Price and availability

Sold by Nouveaux and sent from Switzerland, this listing is a single 40iu vial. It is listed at $320.00. Funds stay in escrow and are released to Nouveaux only when you mark the order as received.

What it is studied for

Growth hormone binds a preformed dimer of GH receptors, rotating the receptor pair and activating the associated JAK2 kinase. Downstream STAT5 signaling drives transcription of IGF-1, especially in liver, along with IGFBP-3 and the acid-labile subunit. GH also acts directly on adipose tissue, where it is studied for promoting lipolysis, and on muscle and bone, while opposing insulin action in some tissues. Research on the axis separates these direct effects from IGF-1-mediated ones, and feedback from IGF-1 and somatostatin regulates the body's own secretion.

Research and regulatory status

Recombinant somatropin has been an approved prescription medicine for decades, used for growth hormone deficiency in children and adults and several other licensed indications, so its pharmacology is unusually well documented. Research continues on body composition, bone, aging and tissue repair. In the United States, distribution of growth hormone outside approved medical uses is specifically restricted by law. Research-grade material differs from licensed products in manufacturing oversight, so buyers on GLP1 Forum Escrow should rely on independent testing rather than labels.

Checking the lab data

Protein analysis differs from short-peptide testing. A credible report should show intact mass by mass spectrometry consistent with about 22.1 kDa, SDS-PAGE or size-exclusion chromatography to detect dimers and aggregates, and reversed-phase HPLC for related variants such as deamidated or oxidized forms. Content should be stated in milligrams, with any IU conversion explained. Appearance should be a white lyophilized cake, accompanied by a batch number and test date.

An independent lab report is attached to this listing, and the panel above shows the measured result next to the labelled amount.

Listing details

Compound

HGH (Somatropin)

Synonyms

Human Growth Hormone, Somatotropin

Class

Recombinant 191-amino-acid pituitary hormone

Format

Lyophilized (freeze-dried) powder

Molecular formula

C₉₉₀H₁₅₂₈N₂₆₂O₃₀₀S₇

Molecular weight

~22.1 kDa

Vial strength

40iu

Sold by

Nouveaux

Ships from

Switzerland

Lab report

Independent report attached

Storage and preparation

Freeze-dried peptide keeps best sealed, cold and dark. Once it has been dissolved, refrigerate it, avoid repeated warming and follow the stability limits in your study protocol.

Concentration arithmetic: one 40 IU vial dissolved in 2 mL gives 20 IU/mL, or 40 IU/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

Supplied for laboratory research only. Not for human or veterinary use, and not a substitute for any prescription medicine. Nothing on this page is medical advice.