Epithalon vs Thymalin
A neutral, side-by-side comparison of two anti-aging & longevity peptides — their mechanisms, dosing ranges, administration routes, side effects, and research evidence. For research and educational purposes only.
Epithalon
Epithalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) derived from Epithalamin, a polypeptide extract of the pineal gland. It has been studied since the 1980s by Russian researchers, primarily Vladimir Khavinson, for its ability to activate telomerase and extend telomere length — one of the few compounds with direct evidence of telomere elongation in human cells.
Full profileThymalin
Thymus-derived peptide bioregulator developed in Russia containing a mixture of low-molecular-weight peptides extracted from calf thymus. Primarily studied for reversing immunological aging (immunosenescence) and extending healthy lifespan. Vladimir Khavinson's longitudinal research on elderly patients links thymalin administration to significant improvements in immune markers and all-cause mortality reduction.
Full profile| Epithalon | Thymalin | |
|---|---|---|
| Category | Anti-Aging & Longevity | Anti-Aging & Longevity |
| Also known as | Epitalon, Epithalone, Tetrapeptide Ala-Glu-Asp-Gly | thymic peptide bioregulator, T-activin extract, thymus peptide, thymic bioregulator |
| Evidence | Research-stage | Research-stage |
| Dosing range | 5mg–20mg mg, daily for 10–20 day cycles, 1–2x per year | 5mg–20mg mg, 5–10 day course, 1–2x per year |
| Administration | Subcutaneous injection, Intravenous (clinical studies), Intranasal | Intramuscular injection, Subcutaneous injection |
| Key side effects | Generally very well-tolerated, Injection site discomfort, Vivid dreams (commonly reported), Improved sleep depth (often reported as benefit) | Injection site reactions, Mild fever (rare), Temporary increase in immune activity (desired response), Rare hypersensitivity |
| Cited sources | 2 references | 2 references |
Key differences
- Administration: Epithalon — Subcutaneous injection, Intravenous (clinical studies), Intranasal; Thymalin — Intramuscular injection, Subcutaneous injection.
- Frequency: Epithalon is typically daily for 10–20 day cycles, 1–2x per year; Thymalin is 5–10 day course, 1–2x per year.
How each works
Epithalon
Epithalon activates telomerase (hTERT), the enzyme responsible for maintaining telomere length. In vitro and animal studies show telomere elongation, extended cell lifespan, and reduced DNA oxidation. Russian clinical studies in aging populations report improved melatonin rhythms, immune function, and reduced cancer incidence over multi-year follow-up.
Thymalin
Thymalin contains multiple bioactive peptides that stimulate T-lymphocyte differentiation and restore thymic function that declines with age. In Khavinson's 6-year controlled trial of elderly patients (78–89 years), annual thymalin courses were associated with significantly lower mortality and improved immune parameters vs. controls. Proposed mechanisms include telomerase activation in immune cells and restoration of thymic epithelial cell function.
This comparison aggregates public research and structured profile data for informational purposes only. It is not medical advice and does not recommend either compound for human use. Consult a qualified healthcare provider before considering any peptide.