HGH 191AA (Somatropin)
Standard Growth Hormone
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Lab-Grade Guarantee
If an independent HPLC assay of your lot comes back below the purity stated on our published Certificate of Analysis, we reship your order free. Verifiable, not a promise.
99.38% Purity Verified
HPLC / ESI-MS / SDS-PAGE Tested
FOR RESEARCH PURPOSES ONLY. This product is strictly for laboratory and research use. Not for human consumption, medical treatment, or any clinical application. By ordering, you confirm you are a qualified researcher or represent a legitimate research institution.
HGH 191AA (Somatropin): Key Facts
HGH 191AA (Somatropin) is a growth hormone research peptide supplied by LyzeLabs as a lyophilized reference standard, strictly for laboratory research use. It is available in 5 formats starting at $290 per kit. Each batch is independently HPLC-verified at 99.38% purity by Janoshik Analytical, with the certificate of analysis published on the lab-results page and matched to the lot number printed on the vial.
| Compound | HGH 191AA (Somatropin) |
|---|---|
| Research category | Growth Hormone |
| Available formats | 10iu*10vials, 12iu*10vials, 15iu*10vials, 24iu*10vials, 36iu*10vials |
| Starting price | From $290 USD per kit |
| Purity | 99.38% verified (third-party HPLC, Janoshik) |
| Test method | HPLC / ESI-MS / SDS-PAGE |
| Certificate of analysis | Published online, matched to the vial lot number |
| Intended use | Laboratory research use only. Not for human consumption. |
| Handling | Supplied lyophilized, store per the stability guide |
Dr. Rajesh Sharma
Spain
"Our endocrinology lab at our institutional research facility in Berlin has been using LyzeLabs HGH 191AA for IGF-1 pathway research for 10 months. The authentic 191-amino acid sequence is critical for our work - we've confirmed identical biological activity to reference standards. Purity >99.1% verified by our HPLC. The 5 IU variant options support our complete dose-response characterization. Delivery to Berlin takes 12 days with excellent cold chain packaging. This is essential for serious somatotropic axis research!"
2025-11-15
Greg S.
United States
"Fair comms, accurate specs, a certificate I could verify. Works."
2025-11-12
Daniel R.
Germany
"Lot number on the vial matched the COA online. Not every source bothers."
2025-11-08
About This Product
HGH 191AA Somatropin Research Guide
Why the 191 Matters
Human growth hormone exists in two synthetic variants in the research supply chain: 191 amino acid (somatropin) and 192 amino acid. They are not the same compound. The 191AA sequence is structurally identical to the hormone the human pituitary produces. The 192AA variant carries an extra N-terminal methionine residue that makes it immunogenic in research models, triggering antibody formation that degrades reproducibility across longer protocols.
If your research requires the human-identical sequence, 191AA is the only correct choice. LyzeLabs supplies authentic recombinant 191AA somatropin.
Mechanism and Research Applications
- Direct GH receptor activation: binds hepatic and peripheral GH receptors, triggering downstream STAT5 signaling and the JAK-STAT transcription cascade
- IGF-1 axis research: drives hepatic IGF-1 production, the main downstream mediator of GH effects on protein synthesis and connective tissue
- Protein synthesis and nitrogen balance research: well-characterized anabolic effects in matched research models
- Lipid metabolism studies: mobilizes fatty acids from adipose tissue and shifts substrate utilization
- Connective tissue and tendon research: GH upregulates collagen synthesis in tendon and ligament research protocols
Why Sourcing Matters More for HGH Than Other Compounds
HGH quality variance in the research supply is wider than almost any other compound. Real 191AA somatropin requires proper recombinant expression, full folding verification, and mass spec confirmation of the complete 191-residue sequence. Shortcuts produce degraded or incomplete protein that does not reproduce the expected research outcomes.
Quality Standards
- Purity: 99 percent plus verified by independent third-party HPLC (Janoshik Analytical)
- Sequence: authentic 191 amino acid somatropin, verified by mass spectrometry
- Bioactivity: confirmed IGF-1 stimulation in reference assays
- Form: lyophilized powder in sterile vials
- Storage: refrigerator for near-term use, minus 20 degrees Celsius long-term
- Documentation: batch-matched Certificate of Analysis published at /lab-results
For the full 191AA versus 192AA explanation and the reasoning behind the sequence difference, see the [HGH 191AA Research Guide](/blog/hgh-191aa-somatropin-research-guide).
For research purposes only. Not for human consumption or therapeutic use.
Research Context for HGH 191AA (Somatropin)
Growth Hormone Research Context
Growth hormone research compounds are studied for their effects on protein synthesis, lipid metabolism, connective tissue remodeling, and the downstream IGF-1 axis. Research protocols here are sensitive to dose, timing, and the specific form of the compound, which is why accurate sourcing and a clear analytical profile matter more than in most other categories.
HGH 191AA (Somatropin) ships as a lyophilized research reagent through the LyzeLabs™ catalog in the Growth Hormone category, with 5 variant options sized to different research protocols. Every batch is independently verified by Janoshik Analytical, with the full HPLC chromatogram and mass spectrometry confirmation published on the LyzeLabs lab results page and matched to the lot number printed on your vial.
Related Research Guides
HGH 191AA Somatropin Research Guide
Why 191AA is the human-identical sequence and what happens when you use the 192AA version in research.
How to Read a Peptide Certificate of Analysis
The verification routine every research lab should run before accepting a vial.
How to Reconstitute a Research Peptide
The nine-step procedure, common mistakes, and per-compound notes for clean reconstitution.
Frequently Asked Questions
HGH 191AA (Somatropin)
$290