Thymalin vs Pal-AHK
Side-by-side comparison of key properties, dosing, and research.
- Summary
- Thymalin is a polypeptide complex isolated from calf thymus glands (developed by the Russian Gerontology Institute), shown to restore immune function, extend lifespan, and reverse thymic involution. Clinical studies demonstrate improved immune parameters and up to 40% reduction in mortality in elderly patients.
- Pal-AHK is the palmitoylated form of the AHK-Cu copper tripeptide, created by attaching a palmitic acid chain to enhance skin penetration and lipid bilayer affinity. The palmitoyl modification significantly improves dermal bioavailability compared to unmodified AHK, making it particularly effective in anti-aging and hair growth formulations.
- Half-Life
- Not well characterized as a complex extract; individual peptides have varying kinetics
- Extended (lipid depot effect in stratum corneum)
- Admin Route
- SubQ, IM
- Topical
- Research
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- Typical Dose
- 10 mg IM or SC daily
- 0.01–0.05% in formulation
- Frequency
- Once daily
- Once or twice daily
- Key Benefits
- Restores thymic function and T-cell immunity
- Extends healthy lifespan (documented in long-term studies)
- Reduces infectious disease incidence in elderly
- Normalizes immune parameters in immunodeficiency
- Anti-tumor immune surveillance
- Improves vaccine response in elderly
- Reduces cardiovascular mortality (40% in landmark Russian study)
- Normalizes neuroendocrine function
- Enhanced skin penetration vs. unmodified AHK-Cu
- Stimulates dermal collagen and elastin production
- Promotes hair follicle anagen phase
- Antioxidant and wound healing activity
- Firming and plumping effect on aging skin
- Improved bioavailability via lipid bilayer incorporation
- Side Effects
- Very well tolerated in decades of Russian clinical use
- Mild injection site reactions
- Rare: mild allergic reaction (natural extract)
- Transient flu-like symptoms on initiation (immune activation)
- Generally well-tolerated
- Mild irritation at high concentrations in sensitive skin
- Possible comedogenicity at very high palmitate concentrations (formulation-dependent)
- Stacks With
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