Testagen
Testicular bioregulator · KEDG peptide · Testosterone bioregulator
A tetrapeptide bioregulator from the Khavinson Institute targeting testicular cells (Leydig and Sertoli cells), studied for supporting endogenous testosterone production and male reproductive function.
Half-Life
~30-60 minutes (estimated)
MW
N/A
Amino Acids
N/A
Evidence
Low Evidence
Regulatory Status
Research compound. Used in some Eastern European andrology and anti-aging research. Not FDA/EMA approved.
In Plain English
A 4-amino acid peptide targeting testicular Leydig cells directly, working at the gene level to restore the cellular machinery that produces testosterone. Not testosterone itself — instead it reactivates the genes for testosterone production that get silenced with age. Unlike TRT, it doesn't suppress the body's own hormonal axis.
Overview
Testagen is a synthetic peptide bioregulator developed by the Khavinson research group, targeted specifically at testicular tissue — primarily Leydig cells (which produce testosterone) and Sertoli cells. It follows the same epigenetic mechanism as Epitalon, Thymalin, and other Khavinson bioregulators: short peptides that bind chromatin and restore gene expression in aged or impaired tissue-specific cells. Research focuses on restoration of testosterone biosynthesis, improved Leydig cell steroidogenic capacity, and support for male reproductive health in aging males. Used in some Eastern European anti-aging and andrology research contexts.
Common Formats
- Lyophilized powder (injectable)
- Oral capsules (research)
Storage Notes
-20°C lyophilized. 4°C reconstituted. Protect from light.
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Related Compounds
Epitalon
A synthetic tetrapeptide based on Epithalamin with telomerase activation and antioxidant properties showing remarkable longevity effects in multiple animal species.
Kisspeptin
An endogenous neuropeptide and master regulator of the HPG axis, GnRH release, and reproductive function with significant clinical research interest.
Gonadorelin
The endogenous hypothalamic hormone that regulates the HPG axis through pulsatile GnRH receptor signaling, used in fertility and hormonal research.
Thymalin
Polypeptide extract from the thymus gland that broadly restores immune function and extends longevity in research.
Educational Disclaimer: All information on this page is for educational and research purposes only. This does not constitute medical advice, diagnosis, or treatment recommendation. Consult a qualified healthcare professional.