MOLECULAR INFORMATION
Molecular information
- Type
- Polypeptide complex extracted from calf thymus · claimed immunomodulator
Thymalin is a Khavinson-era thymic polypeptide complex, distinct from the defined-sequence synthetic peptides in the same family.
Claims vs evidence
- Immunomodulation in immunocompromised states — Russian clinical use, no Western RCT
- Cancer adjuvant — claimed in Soviet-era literature, not replicated
Why we grade it D
The tissue-extract nature makes batch-to-batch standardisation difficult, and Western regulators require defined-composition drugs. The Russian clinical record adds some safety data but does not substitute for modern RCT evidence.
Frequently asked questions
- What is Thymalin?
- A polypeptide complex extracted from calf thymus tissue, developed in the Soviet Union / Russia as an immunomodulator. Used in Russian clinical practice; not authorised in Western markets.
- Is Thymalin the same as Thymosin alpha-1?
- No — Thymalin is a polypeptide complex (mixture of peptides) from thymic tissue; Thymosin alpha-1 (Zadaxin) is a defined 28-amino-acid synthetic peptide with regulatory authorisations in ~35 countries.
- Why grade D?
- Despite a long Russian clinical history, the molecule's identity is not well-characterised (it's a tissue extract, not a single defined peptide), and Western regulatory authorisation is absent. Independent replication of the Russian efficacy claims is sparse.