Testagen vs Vilon
Side-by-side comparison of key properties, dosing, and research.
- Summary
- 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.
- Vilon is a synthetic dipeptide (Lys-Glu) derived from the thymus gland extract Thymalin. The shortest immune-regulatory peptide known, Vilon modulates T-cell and NK-cell function, extends lifespan in animal models, and shows epigenetic anti-aging activity. It is one of the Khavinson peptide bioregulators.
- Half-Life
- Short (minutes); sustained gene-regulatory effects
- Very short as a free dipeptide; effects mediated via gene regulation
- Admin Route
- SubQ, Oral
- SubQ, Oral
- Research
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- Typical Dose
- 10 mg per day
- 1–2 mg SC daily or 5–10 mg oral daily
- Frequency
- Daily for 10–30 days
- Once daily
- Key Benefits
- 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
- Immune system modulation and restoration
- Lifespan extension (30–40% in animal studies)
- T-cell and NK-cell activation
- Epigenetic anti-aging activity
- Reduces oxidative stress markers
- Antioxidant gene upregulation
- May prevent age-related immune senescence
- Anti-tumor immune surveillance
- Side Effects
- Generally well tolerated
- Mild injection site reactions
- No significant endocrine disruption reported at standard doses
- Excellent safety profile, decades of Russian clinical use
- Rare: mild injection site reaction
- Very rare: mild allergic reaction
- Stacks With
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