HD5 vs HBD-2
Head-to-head comparison of HD5 (Human Alpha-Defensin 5) and HBD-2 (Human Beta-Defensin 2) — benefits, dosing, side effects, research data, and where to buy.
| Property | HD5 | HBD-2 |
|---|---|---|
| Category | Immune Support | Immune Support |
| Full Name | Human Alpha-Defensin 5 | Human Beta-Defensin 2 |
| Molecular Weight | 3708 Da | 4316 Da |
| Half-Life | Minutes to hours; protease-sensitive | Minutes to hours; protease-sensitive |
| Amino Acids | 32 | 41 |
| Typical Dose | Research use only; no approved human dose | Research use only; no approved human dose |
| Route | Oral-local gut / Research parenteral | Topical / Intranasal / Research parenteral |
| Purity | ≥98% | ≥98% |
| Studies Count | 260 | 420 |
| Research Status | Pre-clinical | Pre-clinical |
HD5 Benefits
- ✓gut mucosal defense
- ✓antimicrobial activity
- ✓microbiome balance support
- ✓barrier integrity support
HBD-2 Benefits
- ✓broad-spectrum antimicrobial activity
- ✓epithelial barrier defense
- ✓innate immune modulation
- ✓anti-biofilm potential
HD5 Dosing
0.1–10 µM in vitro|1–5 mg/kg in animal models|No established human dose
HBD-2 Dosing
0.1–10 µM in vitro|1–5 mg/kg in animal models|No established human dose
HD5 Side Effects
- ⚠protease sensitivity
- ⚠potential epithelial irritation at high concentrations
- ⚠unknown systemic safety
HBD-2 Side Effects
- ⚠local irritation at high concentrations
- ⚠proteolytic instability
- ⚠potential pro-inflammatory signaling
Research Overview
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.
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.
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