Name: HGH 191AA (Somatropin) 12iu (10 Vials / Kit)
Brand: TFC Peptides
SKU: TFC-H12
Price: 65.00 USD
Availability: InStock

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

This is TFC Peptides‘s kit of 10 vials at 12IU each, dispatched from Tianjin, China. It is listed at $65.00. Your payment waits in escrow until you confirm the parcel arrived, and only then is it released to the brand.

This listing: TFC Peptides HGH 191AA (Somatropin)

Brand: TFC Peptides
Kit: 10 vials × 12 IU (120 IU in total)
Price per vial: $6.50
Other strengths: 6 IU $45.00 · 10 IU $55.00 · 15 IU $75.00 · 24 IU $100.00 · 36 IU $140.00 · 100 IU $360.00

Lab testing

There is no public lab report for this listing yet. We can ask the brand for the batch COA before you order. Many buyers also split an independent HPLC test with others who bought the same batch.

Request the batch COA · How group testing works

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

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.

This listing has no third-party report on file yet. The lab reports directory and the HGH (Somatropin) page show which brands do publish testing.

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: 12IU
Vials per kit: 10
Sold by: TFC Peptides
Ships from: Tianjin, China
Lab report: Not yet published

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 12 IU vial dissolved in 2 mL gives 6 IU/mL, or 12 IU/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

Why does recombinant production matter for HGH?

Before recombinant methods, growth hormone was extracted from human pituitary glands, and some of that material transmitted prion disease. Producing the protein in engineered cells removed that source of contamination and allowed consistent, large-scale manufacture. Quality still depends on purification, which is why aggregate and variant testing matter for any batch.

How does HGH differ from the growth-hormone secretagogues in this catalogue?

Secretagogues such as ipamorelin or tesamorelin are studied for prompting the pituitary to release its own growth hormone, so normal feedback controls still apply. Somatropin is the hormone itself and bypasses those controls. Researchers choose between them depending on whether the question concerns pituitary regulation or downstream GH receptor effects.

How much HGH (Somatropin) is in this listing?

10 vials of 12IU each. Where a lab report exists, the testing panel above shows what the brand's tested sample actually measured.

When does TFC Peptides get paid?

Only after you confirm delivery. Until then the payment is held in escrow, and you can open a claim if anything is wrong with the order.

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.