Epithalon vs Testagen
Side-by-side comparison of key properties, dosing, and research.
- Summary
- Epithalon is a synthetic tetrapeptide developed from the pineal gland extract Epithalamin by Russian scientist Dr. Vladimir Khavinson. It is one of the most researched longevity peptides, known for activating telomerase and extending telomere length — the molecular hallmarks of cellular aging.
- Testagen is a tetrapeptide bioregulator (Lys-Glu-Asp-Gly) developed by Professor Vladimir Khavinson, tissue-specific for the testes. It supports Leydig cell function, normalization of testosterone biosynthesis, and spermatogenic activity. Testagen is used in men's health protocols for age-related testosterone decline, male fertility support, and testicular anti-aging.
- Half-Life
- 2–4 hours
- Short (minutes); sustained gene-regulatory effects
- Admin Route
- SubQ, Sublingual
- SubQ, Oral
- Research
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- Typical Dose
- 5–10 mg total per cycle
- 10 mg per day
- Frequency
- 0.5–1 mg daily
- Daily for 10–30 days
- Key Benefits
- Activates telomerase enzyme, extending telomere length
- May slow cellular and biological aging
- Regulates melatonin production and circadian rhythms
- Improves sleep quality
- Powerful antioxidant properties
- May reduce incidence of age-related diseases
- Supports immune system function
- Studied for cancer prevention properties in animal models
- Supports endogenous testosterone synthesis via Leydig cell normalization
- Promotes spermatogenesis and sperm quality
- Anti-aging effects on testicular tissue
- May attenuate age-related testosterone decline
- Mechanistically distinct from TRT — does not suppress HPG axis
- Useful adjunct to Gonadorelin and Kisspeptin-10 in male hormonal protocols
- Supports male fertility without exogenous hormone replacement
- Side Effects
- Injection site irritation (mild)
- Temporary sleep changes during cycle (usually improves)
- Rare: fatigue
- Generally well tolerated
- Mild injection site reactions
- No significant endocrine disruption reported at standard doses
- Stacks With
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