Testagen
Testagen is a hyper-targeted Khavinson synthetic tripeptide precisely engineered for total epigenetic mastery over male testicular function. Standing far above temporary exogenous hormone replacement, Testagen is utilized in aggressive male optimization protocols to physically restore testicular volume, radically accelerate massive endogenous testosterone production, and forcefully reverse the biological clock on Leydig cell senescence.
Quick Stats
Scientific Data
Mechanism of Action
Testagen (Lys-Glu-Asp-Gly) is a tetrapeptide bioregulator targeting testicular tissue. It promotes the restoration of testicular cell gene expression, supporting Leydig cell function (testosterone production) and spermatogenesis. It is used in Khavinson protocols to address age-related decline in male endocrine function, restoring the body's natural rhythm rather than replacing exogenous hormones.
Source: PMID: 15677927
Background & History
Testagen targets testicular Leydig cells for testosterone biosynthesis gene expression.
Research Use Cases
- ✓Male hormonal health
- ✓Age-related testosterone decline support
- ✓Hormone optimization protocols
Dosing Protocol
| Typical Dose | 10-20 mg/day (oral) or 1-2 mg SC |
| Frequency | 1× daily for 10-30 day cycles |
| Half-Life | ~30 minutes (estimated) |
| Common Vial Sizes | 5 mg, 10 mg |
Dosing Protocols
Khavinson Protocol
Body-Weight Dosing Reference
Estimated doses extrapolated from the published research range of 1000–20000 mcg/day (referenced to 70 kg / 154 lb). These are approximations — consult a qualified healthcare provider for personalised guidance.
| Weight | Low Dose | Target Dose | High Dose |
|---|---|---|---|
| 120 lb(54 kg) | 771 mcg | 8100 mcg | 15429 mcg |
| 140 lb(63 kg) | 900 mcg | 9450 mcg | 18000 mcg |
| 160 lb(73 kg) | 1043 mcg | 10950 mcg | 20857 mcg |
| 180 lb(82 kg) | 1171 mcg | 12300 mcg | 23429 mcg |
| 200 lb(91 kg) | 1300 mcg | 13650 mcg | 26000 mcg |
| 220 lb(100 kg) | 1429 mcg | 15000 mcg | 28571 mcg |
| 250 lb(113 kg) | 1614 mcg | 16950 mcg | 32286 mcg |
💉 For exact syringe units based on your vial concentration, use the Testagen Reconstitution Calculator →
Administration
Expected Timeline
Who Is It For?
Male Endocrine Aging
LowTesticular bioregulator. Restores age-suppressed testicular gene expression without shutting down HPTA.
Reconstitution Example
Safety & Considerations
Research peptide. Extensively used in Russian clinical protocols. Does NOT shut down natural testosterone production like TRT.
Regulatory & Legal Status
Not currently on the WADA 2026 Prohibited List. Policies may change — verify before competition.
Research Chemical
US Compounding: Not eligible / not available
⚠️ This information is for educational purposes only and may not reflect the most current regulatory updates. Always verify with official FDA, WADA, and jurisdiction-specific sources before use.
Interactions & Contraindications
Standard Khavinson protocol. Monitor testosterone levels.
Synergies & Common Stacks
Testagen (synthetic) + Testoluten (testicular Cytomax) = layered male reproductive bioregulator support.
Dosing Quick Reference
Frequently Asked Questions
Is Testagen a substitute for TRT?▼
References
- Khavinson VKh et al. “"Short peptides stimulate testosterone production in aging".” Advances in Gerontology (2005). PMID: 16152864
📚 Related Articles
Get Testagen from Vita-Stream — the comprehensive distributor for authentic Khavinson bioregulators. Oral capsules, no injections required.
Affiliate link · Full review