hGHRH(1-37)OH vs hGHRH(1-40)OH
Head-to-head comparison of hGHRH(1-37)OH (Human growth hormone-releasing factor (1-37) hydroxyl) and hGHRH(1-40)OH (Human growth hormone-releasing factor (1-40) hydroxyl) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | hGHRH(1-37)OH | hGHRH(1-40)OH |
|---|---|---|
| Category | Growth Hormone | Growth Hormone |
| Full Name | Human growth hormone-releasing factor (1-37) hydroxyl | Human growth hormone-releasing factor (1-40) hydroxyl |
| Molecular Weight | N/A | N/A |
| Half-Life | 5-20 minutes | 5-20 minutes |
| Amino Acids | 37 | 40 |
| Typical Dose | 1-2 mcg/kg | 1-2 mcg/kg |
| Route | Subcutaneous/IV | Subcutaneous/IV |
| Purity | ≥98% | ≥98% |
| Studies Count | 60 | 85 |
| Research Status | Clinical Research | Clinical Research |
hGHRH(1-37)OH Benefits
- ✓GH release studies
- ✓minimal-sequence mapping
- ✓receptor pharmacology
- ✓peptide stability research
hGHRH(1-40)OH Benefits
- ✓GH secretion research
- ✓fragment-activity comparison
- ✓receptor binding studies
- ✓axis physiology modeling
hGHRH(1-37)OH Dosing
1-2 mcg/kg SC or IV bolus|acute stimulation with serial GH assays|short-course research administration with biomarker monitoring
hGHRH(1-40)OH Dosing
1-2 mcg/kg SC or IV in acute research settings|single-bolus GH stimulation protocols|repeated low-dose administration in comparative studies
hGHRH(1-37)OH Side Effects
- ⚠flushing
- ⚠headache
- ⚠transient fatigue
hGHRH(1-40)OH Side Effects
- ⚠flushing
- ⚠headache
- ⚠lightheadedness
Research Overview
hGHRH(1-37)OH
Human GHRF(1-37)OH has appeared in studies examining how loss of C-terminal residues affects biological activity at the GHRH receptor. It is often used alongside other fragments to define structure-activity relationships within the GHRH family.
hGHRH(1-40)OH
Human GHRF(1-40)OH has been studied to understand how truncation of the native hormone changes biological potency and half-life. It is a common research tool for mapping minimal active sequences within the GHRH family.
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