MK-677 vs hBD-1
Head-to-head comparison of MK-677 (Ibutamoren Mesylate (MK-677)) and hBD-1 (Human beta-defensin 1) — benefits, dosing, side effects, research data, and where to buy.
| Property | MK-677 | hBD-1 |
|---|---|---|
| Category | Growth Hormone | Dental & Oral |
| Full Name | Ibutamoren Mesylate (MK-677) | Human beta-defensin 1 |
| Molecular Weight | 528.662 g/mol | 4490 Da |
| Half-Life | ~24 hours | minutes to hours |
| Amino Acids | Non-peptide compound | 36 |
| Typical Dose | — | 1-10 µg/mL in experimental studies |
| Route | — | Topical/Intraoral |
| Purity | >99% | ≥98% |
| Studies Count | 120 | 85 |
| Research Status | Active Research | Pre-clinical |
MK-677 Benefits
- ✓Oral GH secretagogue, 24-hour GH elevation, increases IGF-1, improves sleep quality, increases lean mass, does not suppress natural GH
hBD-1 Benefits
- ✓oral innate immunity
- ✓broad antimicrobial activity
- ✓biofilm suppression
- ✓periodontal support
MK-677 Dosing
10-25 mg orally once daily before bedtime. 25 mg is the most studied dose. Can be used long-term without cycling.
hBD-1 Dosing
topical peptide exposure|cell-culture or mucosal models|repeat low-dose application in research
MK-677 Side Effects
- ⚠Increased appetite, mild water retention, drowsiness, transient numbness, mild increase in fasting blood glucose with long-term use.
hBD-1 Side Effects
- ⚠protease degradation
- ⚠local irritation at high dose
- ⚠limited stability in saliva
Research Overview
MK-677
A landmark 2-year study in elderly adults demonstrated significant increases in lean mass, GH pulsatility, and IGF-1 to youthful ranges. Selectively agonizes GHS-R1a without increasing cortisol or prolactin.
hBD-1
hBD-1 has been studied as part of the oral mucosal defense system and is linked to host resistance against dental pathogens. Research spans periodontitis, candidiasis, and epithelial barrier biology.
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