Growth Hormone Axis · Growth Hormone Axis peptide (research)
HGH 191AA
- Drug class
- Growth Hormone Axis peptide (research)
- Status
- Compounded (503A)
- Also known as
- somatropin, recombinant hgh, rhgh, human growth hormone, hgh 191
- Reviewed
- 2026-06-01 · Dr. Ana Lisa Carr, MD
What HGH 191AA is studied for
- Body composition (research)
- Recovery (research)
- Lean mass (research)
Mechanism of action
HGH 191AA is being studied in the growth hormone axis category. Recombinant human growth hormone (somatropin) — 191 amino acid sequence. Mechanism of action varies by study model; refer to the kindr clinical library for a deeper writeup.
Frequently asked questions
What is HGH 191AA?
HGH 191AA is a growth hormone axis peptide. Recombinant human growth hormone (somatropin) — 191 amino acid sequence.
What is HGH 191AA studied for?
Published research has examined HGH 191AA for body composition, recovery, lean mass. Human clinical evidence varies by indication.
Is HGH 191AA FDA-approved?
No. HGH 191AA is not FDA-approved for the indications listed. It is available compounded by 503A pharmacies under clinician supervision, or for international research use only on this catalog.
How is HGH 191AA used in research?
Protocols vary by study. HGH 191AA is typically administered subcutaneously in research settings. No validated human therapeutic dose exists outside FDA-approved indications.
What are the known risks?
Long-term human safety data for HGH 191AA is limited. Theoretical risks vary by mechanism. Any human use should be supervised by a licensed clinician.