Understand the source comparison
Extract vs Synthetic — The Family's Central Honesty Point
If a reader takes one thing from this page, it should be this distinction, because nearly every misleading claim about bioregulators lives in the gap between the two. The tissue extracts (the cytamins) are complex, multi-component preparations pulled from anim
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- If a reader takes one thing from this page, it should be this distinction, because nearly every misleading claim about bioregulators lives in the gap between the two.
- The tissue extracts (the cytamins) are complex, multi-component preparations pulled from animal organs. They are what Russian clinicians actually used, sometimes for decades, and so they carry whatever real human track record the family has. Thymalin (thymus extract) and Prostatilen (prostate extract) have the deepest clinical literature — Prostatilen has published human data in chronic prostatitis and benign prostatic conditions (PMID 36318852).
- The synthetic short peptides are single, defined molecules designed from those extracts. They are cleaner, reproducible and what vendors ship — but in most cases they do not inherit the extract's human data. Cortagen is not Cortexin. Thymogen is not Thymalin. Prostamax is not Prostatilen. The synthetic version has to earn its own evidence, and for most of the family that evidence stops at cell culture and rodents.
- This is why marketing that borrows the extract's clinical reputation for the synthetic peptide in the vial is the single most common distortion in this space. When a product page for a synthetic tetrapeptide cites "decades of clinical use," that history almost always belongs to the extract. Carry that question — is this claim about the extract or about the synthetic peptide? — into every row below.