HD5 vs Thymopentin
Head-to-head comparison of HD5 (Human Alpha-Defensin 5) and Thymopentin (L-Arginyl-L-Lysyl-L-Aspartyl-L-Valyl-L-Tyrosine) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | HD5 | Thymopentin |
|---|---|---|
| Category | Immune Support | Immune Support |
| Full Name | Human Alpha-Defensin 5 | L-Arginyl-L-Lysyl-L-Aspartyl-L-Valyl-L-Tyrosine |
| Molecular Weight | 3708 Da | 676.78 Da |
| Half-Life | Minutes to hours; protease-sensitive | 10-30 min |
| Amino Acids | 32 | 5 |
| Typical Dose | Research use only; no approved human dose | 1 mg |
| Route | Oral-local gut / Research parenteral | Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 260 | 90 |
| Research Status | Pre-clinical | Clinical |
HD5 Benefits
- ✓gut mucosal defense
- ✓antimicrobial activity
- ✓microbiome balance support
- ✓barrier integrity support
Thymopentin Benefits
- ✓t-cell maturation
- ✓helper-suppressor balance
- ✓immune recovery
- ✓antiviral-adjunct research
HD5 Dosing
0.1–10 µM in vitro|1–5 mg/kg in animal models|No established human dose
Thymopentin Dosing
1 mg SC or IM|2-3x weekly|4-8 week study cycles
HD5 Side Effects
- ⚠protease sensitivity
- ⚠potential epithelial irritation at high concentrations
- ⚠unknown systemic safety
Thymopentin Side Effects
- ⚠injection-site redness
- ⚠mild fever
- ⚠headache
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.
Thymopentin
Thymopentin has a long history of preclinical and clinical investigation as a thymic peptide immunomodulator. Published studies report effects on T-cell subsets, cytokine responses, and immune recovery in recurrent infection settings.
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