| Compound | HGH 191AA (Somatropin) |
|---|---|
| Category | Recombinant growth hormone |
| Class | Growth Hormone and Growth Factors |
| Evidence tier | Approved medicine |
| WADA status | Prohibited in sport (or falls under a prohibited class) — see the WADA reference table |
| Sold on this site | No — this is a reference database |
Overview
HGH 191AA (Somatropin) — a recombinant growth hormone — sits in the "Approved medicine" tier of this catalog. This compound exists as an approved medicine in at least one major jurisdiction. Approval applies to specific, labeled indications and to the regulated product — not to compounded or research-grade copies.
Recombinant human growth hormone identical to the 191-amino-acid endogenous protein, approved by prescription for GH deficiency, pediatric growth disorders, and several other indications.
Mechanism of Action
Somatropin activates the GH receptor, driving IGF-1 production and direct metabolic effects on lipid and carbohydrate handling, growth plates in children, and protein anabolism.
Research and Evidence
Decades of clinical data in approved indications — pediatric GH deficiency, adult GH deficiency, Turner syndrome, chronic renal insufficiency, and others — underpin its approval.
Safety and Side Effects
Prescription-only, with side effects including edema, arthralgia, insulin resistance, and — with misuse — potential cardiometabolic harm. Growth hormone is prohibited in sport.
Frequently Asked Questions
What is the evidence tier of HGH 191AA (Somatropin)?
HGH 191AA (Somatropin) is graded "Approved medicine" on this site. This compound exists as an approved medicine in at least one major jurisdiction. Approval applies to specific, labeled indications and to the regulated product — not to compounded or research-grade copies.
Is HGH 191AA (Somatropin) an approved medicine?
HGH 191AA (Somatropin) exists as an approved medicine in at least one major jurisdiction — but approval covers the regulated product and its labeled indications only. Compounded or research-grade versions of the same molecule are not the approved product.
Where can I read the primary studies for HGH 191AA (Somatropin)?
The references section at the end of this entry links the key primary sources — regulator labels, trial registrations, and peer-reviewed papers. Our "How to Read a Peptide Study" guide explains how to evaluate them.
References
- DailyMed — somatropin prescribing information. [source]
- WADA Prohibited List — growth hormone. [source]
Evidence tier: Approved medicine · Last reviewed: 2026-09-05 · Sources cited below.