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Peptide bioregulators

Testagen

Testis-targeted bioregulator peptide from the Khavinson family, proposed for testicular and vascular function.

Experimental research compound Peptide bioregulators Sexual health

Reviewed 2026-09-12
Full name
Testicular/vascular bioregulator peptide
Also known as
testis peptide
Regulatory status
Experimental research compound; minimal published data

Origin

A peptide bioregulator derived from testicular-tissue peptide extraction, developed within Khavinson's bioregulation research framework alongside thymic and pineal preparations. Specific isolation methodology isn't well documented in English-language literature.

Mechanism

Proposed to support testicular function and testosterone production through tissue-specific bioregulatory effects (theoretical Leydig-cell stimulation and vascular support), analogous to Thymalin's action on thymic tissue.

Research summary

Evidence

Zero peer-reviewed research articles specifically on Testagen are indexed in PubMed. Vendor/community sources reference it as a 'testis bioregulator' with claims about testosterone and fertility, entirely anecdotal and unsupported by published studies, the lowest evidence tier of the bioregulator family.

Evidence tier: Experimental research compound — see the methodology note for how this is assessed.

Citations

No specific peer-reviewed citations indexed for this entry — see the research summary above for what evidence does exist.

Reported benefits

  • testosterone support (community claim, unproven)
  • erectile function support (community claim, unproven)
  • fertility support (community claim, unproven)

Dosing protocols reported in the literature & community

These are protocols reported by compounding pharmacies, published trials, or self-experimentation communities — not a prescription. Start low, especially for anything new.

Reported dosing protocols
RouteReported protocol
Subcutaneous or intramuscular injectionNo standardized dosing; online reports suggest 5-10 mg IM weekly, entirely unvalidated.

Side effects

  • unknown; no published data

Safety notes

Safety: No pharmacokinetics, toxicology, or human safety data published anywhere. Any hormonal claims are unproven; self-administration carries unknown risk.
Community & reddit notes (anecdotal — not clinical evidence)

Appears in men's health forums with anecdotal libido/fertility claims; availability limited to a few international suppliers.