HBD-2 vs HD5
Head-to-head comparison of HBD-2 (Human Beta-Defensin 2) and HD5 (Human Alpha-Defensin 5) — benefits, dosing, side effects, research data, and where to buy.
| Property | HBD-2 | HD5 |
|---|---|---|
| Category | Immune Support | Immune Support |
| Full Name | Human Beta-Defensin 2 | Human Alpha-Defensin 5 |
| Molecular Weight | 4316 Da | 3708 Da |
| Half-Life | Minutes to hours; protease-sensitive | Minutes to hours; protease-sensitive |
| Amino Acids | 41 | 32 |
| Typical Dose | Research use only; no approved human dose | Research use only; no approved human dose |
| Route | Topical / Intranasal / Research parenteral | Oral-local gut / Research parenteral |
| Purity | ≥98% | ≥98% |
| Studies Count | 420 | 260 |
| Research Status | Pre-clinical | Pre-clinical |
HBD-2 Benefits
- ✓broad-spectrum antimicrobial activity
- ✓epithelial barrier defense
- ✓innate immune modulation
- ✓anti-biofilm potential
HD5 Benefits
- ✓gut mucosal defense
- ✓antimicrobial activity
- ✓microbiome balance support
- ✓barrier integrity support
HBD-2 Dosing
0.1–10 µM in vitro|1–5 mg/kg in animal models|No established human dose
HD5 Dosing
0.1–10 µM in vitro|1–5 mg/kg in animal models|No established human dose
HBD-2 Side Effects
- ⚠local irritation at high concentrations
- ⚠proteolytic instability
- ⚠potential pro-inflammatory signaling
HD5 Side Effects
- ⚠protease sensitivity
- ⚠potential epithelial irritation at high concentrations
- ⚠unknown systemic safety
Research Overview
HBD-2
Human beta-defensin 2 has been studied extensively for direct microbicidal effects and for its role in shaping mucosal immunity. Preclinical work shows activity against Gram-negative and Gram-positive organisms, with additional effects on leukocyte recruitment and wound defense.
HD5
HD5 has been widely studied in intestinal innate immunity, particularly for its role in defending crypts against bacterial invasion. Preclinical literature supports activity against multiple microbes and links altered HD5 biology with gut barrier dysfunction.
Ready to buy?
Find both peptides from our verified, lab-tested vendors with purity certificates and third-party testing.