HGH 191AA (100IU/33.3mg)
HGH 191AA is recombinant human growth hormone (191 amino acids). Reconstitute with 5mL of bacteriostatic water for a concentration of 20IU/mL (1IU per 5 units).
Reviewed by the AllPeptides.eu Editorial Team·Last reviewed: 2026-06-16
Educational information. Not medical advice, and no efficacy claim is implied. Regulatory approval is not a use recommendation by AllPeptides.eu.
⚠️ For informational/educational purposes only. Not medical advice. We do not sell any products. Self-treatment carries serious risks — consult a healthcare professional. Disclaimer
Research monograph
See the full HGH 191aa encyclopedia page with mechanism, evidence tier, related variants and research context.
How It Works
HGH 191AA binds to growth hormone receptors, triggering IGF-1 synthesis in the liver.
Quick Start
- Typical Dose: 2–4IU subcutaneously, daily
- Frequency: Daily, morning or divided dose
- Storage: 2–8°C after reconstitution
Dosing Table — HGH 191AA 100IU/33.3mg
Route: Subcutaneous injection | Frequency: Daily
| Week | Dose | Units (per injection) |
|---|---|---|
| 1–4 | 2IU | 10 units (0.10mL) |
| 5–8 | 3IU | 15 units (0.15mL) |
| 9+ | 4IU | 20 units (0.20mL) |
Studies report administration fasted in the morning or split into 2 doses. Concentration: 20IU/mL.
Related compounds
Reconstitution Steps
- Clean vial stoppers with alcohol swab.
- Draw 5mL bacteriostatic water.
- Slowly inject into vial wall — do not shake.
- Gently swirl until fully dissolved (may take 10–15 minutes).
- Store refrigerated (2–8°C).
Protocol Overview
- HGH 191AA is biosynthetic growth hormone identical to endogenous GH.
- It directly acts on GH receptors throughout the body.
- Results are gradual over 4–12 weeks.
Dosing Protocol
- Introduction: 2IU/day for 4 weeks.
- Increase to 3–4IU/day based on tolerance.
- Anti-aging: 2–3IU. Athletic performance: 4–6IU.
- Cycle: 3–6 months active.
- Break between cycles: After cycle (3–6 months), a 8–12 week break is recommended.
Washout & Cycle Restart
When can I restart?
After cycle (3–6 months), a 8–12 week break is recommended.
Minimum wait period: 8 weeks
Storage Instructions
- Lyophilized: 2–8°C (ideal) or -20°C long-term.
- Reconstituted: 2–8°C, use within 21 days.
- Avoid vibration and light.
Important Notes
- Monitor IGF-1, fasting glucose, insulin.
- Contraindicated in active neoplasia.
- May cause fluid retention in the initial weeks.
- Consult an endocrinologist before use.
Potential Benefits & Side Effects
Potential Benefits:
- Increased muscle mass
- Reduced body fat
- Improved skin and hair quality
- Enhanced injury recovery
- Improved sleep quality
- Anti-aging effects
Potential Side Effects:
- Fluid retention / edema
- Joint pain
- Carpal tunnel syndrome
- Transient insulin resistance
- Headache
⚠️ Serious Warnings & Long-Term Risks
The following warnings are based on published literature, FDA labels, and post-marketing surveillance. They do not constitute medical advice. Consult a healthcare professional.
Increased neoplasia risk (IGF-1 signaling)
Chronic IGF-1 elevation is epidemiologically linked to increased risk of colorectal, prostate, and breast cancer. Contraindicated in active neoplasia.
📄 Lancet Diabetes Endocrinol 2014; Endocr Rev 2009Cardiomegaly & arrhythmias
Excessive GH/IGF-1 can cause myocardial hypertrophy, dysfunction, and increased cardiovascular risk (acromegaly analogue).
📄 J Clin Endocrinol Metab 2004Insulin resistance & Diabetes Mellitus
GH is counter-insulin. Chronic use may worsen glycemic control or cause type 2 diabetes.
📄 FDA Label — Genotropin®References
- Growth Hormone Therapy — Molitch ME, et al. J Clin Endocrinol Metab. 2011;96(6):1587-1609.
View Source - HGH Anti-Aging — Rudman D, et al. N Engl J Med. 1990;323(1):1-6.
View Source
Recommended Supplements
L-Arginine + L-Ornithine
ZMA (Zinc + Magnesium + B6)
External Sources & Regulatory Status
Regulatory Approvals
Genotropin® / Norditropin® / others · GH deficiency / Turner / SGA (1985)
Genotropin® / Omnitrope® · GH deficiency (1988)
GH deficiency
GH deficiency
GH deficiency
Approved worldwide (5+ countries)
Educational information. Not medical advice, and no efficacy claim is implied. Regulatory approval is not a use recommendation by AllPeptides.eu.
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