Bioregulator Research

Thymalin

Not FDA approvedLongevity & cellularImmune & gut
5.9/10

BioHarmony verdict

Worth trying

Thymalin is a bovine-thymus peptide extract studied for immune restoration and aging. Its strongest claim, a 2 to 4 fold elderly mortality drop per Khavinson 2003, is real but single-source and never independently replicated in the West.

Read full report

What is Thymalin?

Thymalin is a peptide extract pulled from calf thymus, and the most important thing to know up front is that it is a mixture, not a single molecule. It is a fraction of many thymic peptides of different lengths, characterized and put into Russian clinical use as an immunocorrector by the Morozov 1997 and Khavinson group. It comes from Vladimir Khavinson's peptide-bioregulator program, where it has been used for decades to restore immune function and studied for aging. The science is genuinely intriguing but the entire human case rests on a single research lineage.

From the BioHarmony report, reviewed 2026-09-08.

Safety watch-outs

  • Any allergic reaction to a bovine biological, including hives, swelling, or trouble breathing: stop immediately and seek care.
  • Injection-site infection, spreading redness, warmth, or pus: stop and consult a clinician, since grey-market sterility is unverifiable.
  • Any active or suspected cancer: do not use without oncology guidance
  • immune and growth-axis modulation is best avoided.
  • Product labeled as a 2 to 4 amino acid ultrashort peptide: that is a mislabeling red flag, since thymalin is the parent extract, not a…

Full risk profile in the BioHarmony report.

Dosing as published

No approved-label or study protocol is recorded for Thymalin yet.

More reported protocols

Members

Members can compare additional reported doses, schedules, and preparation notes.

Educator coverage (3)

Attributed viewpoints, separate from primary research.

Trust & sourcing

US approvalNot FDA approved
CompoundingNo FDA-approved U.S. product is identified in the reviewed source set
Last checked2026-07-13
Next review2027-01-09

Thymalin is a thymic peptide complex with published laboratory research and Russian clinical literature. The reviewed sources do not establish an FDA-approved U.S. product or a broadly validated U.S. clinical use.

Primary sources

  1. 7.2/10GHK-Cu (Copper Peptide)Strong recommendRecoveryNot FDA approvedGHK-Cu is a human copper-binding tripeptide with the best evidence for topical skin repair and wound healing, including Mulder 1994 diabetic ulcer data showing 98.5%…
  2. 6.7/10Epitalon (Epithalon)Worth tryingBrain & sleepNot FDA approvedEpitalon is a synthetic AEDG tetrapeptide with in vitro telomerase and telomere data, animal lifespan signals, and Russian pineal-peptide melatonin studies.
  3. 6.6/10ThymulinWorth tryingLongevityInvestigationalThymulin (zinc-thymulin) is a chemically defined, zinc-dependent thymic nonapeptide hormone with deep classical immunology behind it but no modern human trial of the…
  4. 6.4/10PinealonWorth tryingBrain & sleepNot FDA approvedPinealon (Glu-Asp-Arg, or EDR) is a synthetic Khavinson tripeptide marketed for neuroprotection and cognition.

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