Thymalin vs HBD-3
Head-to-head comparison of Thymalin (Calf Thymus Peptide Fraction (Thymalin)) and HBD-3 (Human Beta-Defensin 3) — benefits, dosing, side effects, research data, and where to buy.
| Property | Thymalin | HBD-3 |
|---|---|---|
| Category | Immune Support | Immune Support |
| Full Name | Calf Thymus Peptide Fraction (Thymalin) | Human Beta-Defensin 3 |
| Molecular Weight | N/A | 5158 Da |
| Half-Life | N/A | Minutes to hours; protease-sensitive |
| Amino Acids | N/A | 45 |
| Typical Dose | 5-20 mg | Research use only; no approved human dose |
| Route | Intramuscular | Topical / Intranasal / Research parenteral |
| Purity | ≥98% | ≥98% |
| Studies Count | 120 | 380 |
| Research Status | Clinical | Pre-clinical |
Thymalin Benefits
- ✓t-cell support
- ✓leukocyte recovery
- ✓immunomodulation
- ✓infection-resilience
HBD-3 Benefits
- ✓strong antimicrobial activity
- ✓skin and mucosal defense
- ✓innate immune signaling modulation
- ✓wound-healing support
Thymalin Dosing
5-10 mg IM daily|3-10 day cycles|repeat cycles after 1-4 weeks if studied
HBD-3 Dosing
0.1–10 µM in vitro|1–5 mg/kg in animal models|No established human dose
Thymalin Side Effects
- ⚠injection-site discomfort
- ⚠transient fever
- ⚠rash/allergy
HBD-3 Side Effects
- ⚠cell toxicity at high concentrations
- ⚠rapid proteolysis
- ⚠inflammatory activation in some contexts
Research Overview
Thymalin
Thymalin appears in Soviet/Russian clinical literature as a thymus peptide complex used to normalize immune parameters after illness, surgery, or radiation exposure. Reports commonly focus on changes in lymphocyte subsets, phagocytic activity, and infection frequency rather than a single isolated peptide mechanism.
HBD-3
Human beta-defensin 3 has been examined in numerous in vitro and animal studies for antimicrobial and immunomodulatory activity. Research suggests it can help defend barrier tissues while influencing cytokine networks, chemotaxis, and epithelial repair.
Ready to buy?
Find both peptides from our verified, lab-tested vendors with purity certificates and third-party testing.