Testagen
Testagen (Lys-Glu-Asp-Gly)
A tetrapeptide bioregulator derived from testicular tissue. Part of the Russian peptide bioregulator series. Supports testicular function and testosterone production.
Mechanism of Action
Testagen modulates gene expression in Leydig cells and Sertoli cells, supporting testosterone synthesis and spermatogenesis. It may help normalize testicular function in aging males.
Health Claims & Evidence
Supports testicular function and testosterone production
May improve spermatogenesis
Supports male hormonal health in aging
Short-Term Effects
Potential improvements in testosterone markers.
Long-Term Effects
Theoretical testicular function preservation with repeated courses.
Side Effects
Extremely well-tolerated.
Contraindications
Limited data. Use with caution in hormone-sensitive conditions.
This profile is provided for educational research only. It is not a treatment recommendation or dosing guide. Human evidence, safety information and regulatory status vary by substance. Verify primary sources and consult a qualified healthcare professional for medical decisions.
Research Papers
Testagen and testicular bioregulation
Khavinson et al. · Bulletin of Experimental Biology and Medicine · 2008
Educational research only. This profile is not a treatment recommendation or dosing guide. Human evidence, safety information and regulatory status vary by substance. Consult a qualified healthcare professional for medical decisions.
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