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Growth Hormone Secretagogue

HGH 191AA Protocol

Dosing & Research

Last Updated: September 4, 2026

Also known as: Human Growth Hormone, Somatotropin, 191 Amino Acid GH

GH replacement research, IGF-1 elevation studies, Body composition investigations, Bone density and turnover

Half-Life
Variable (3–4 Hour Peak)
Administration
Subcutaneous
Frequency
Once Daily (preferably Bedtime)

How It Works

  • Recombinant wild-type human GH (191 amino acids). Binds GHR for JAK2-STAT signaling to promote IGF-1 synthesis and lipolysis.
  • GH replacement research
  • IGF-1 elevation studies
  • Body composition investigations
  • Bone density and turnover

Dosing Structure

Dose
150–500 mcg daily (conservative) to 1000–2000 mcg daily (advanced metabolic studies)
Frequency
Once Daily (preferably Bedtime)
Notes
Titrate 200 mcg weekly, increasing ~100 mcg/week. Standard 8-week protocol: Week 1 (200mcg) to Week 8 (900mcg). Storage: −20°C (lyophilized); 2–8°C (reconstituted).

Example Protocols

Dose: 150–500 mcg daily (conservative) to 1000–2000 mcg daily (advanced metabolic studies)
Frequency: Once Daily (preferably Bedtime)
Duration: 8–12 Week Cycles
Off Period: Not listed
Calculate dosing →

Find Research Grade HGH 191AA

Recommended vendors for sourcing research-grade material. PeptaBase does not sell peptides directly.

Vendor One Research Labs

COA Verified

Third-party COA-verified research peptides with published batch testing.

Source Coming Soon

Vendor Two Sciences

Purity Tested

US-based research compound supplier with independent purity testing.

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Vendor Three Peptide Co.

Bulk research peptide sourcing with batch-level documentation.

Source Coming Soon
View all recommended vendors →

Protocol Notes

•
Titrate 200 mcg weekly, increasing ~100 mcg/week.
•
Standard 8-week protocol: Week 1 (200mcg) to Week 8 (900mcg).
•
Storage: −20°C (lyophilized); 2–8°C (reconstituted).

Research & Studies

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