Selank

What Selank Is and How It Works Structure and Identity Selank is a heptapeptide: Thr-Lys-Pro-Arg-Pro-Gly-Pro. Formula C33H57N11O9, molecular weight about 752, CAS 129954-34-3. It contains no D-amino acids, no ring and no disulfide bonds, which makes it one of the simpler peptides in this catalog to synthesize and to verify. Its Parent Molecule, Tuftsin Tuftsin is Thr-Lys-Pro-Arg, a four-residue fragment cut from the heavy chain of immunoglobulin G. It was described at Tufts University in the 1970s and studied for its activity on white blood cells. Selank is tuftsin with a three-residue tail attached. Why the Pro-Gly-Pro Tail Tuftsin is cleared from the body in minutes. Adding proline-rich residues at the end makes a peptide much harder for common enzymes to cut. The same approach appears in other peptides from the same Moscow program, which is why several of them share that tail. What the Research Consists Of The published Selank literature is mainly rodent studies and small clinical studies, most of them from Russian groups and many in Russian-language journals. Reported work includes effects on enkephalin breakdown and on gene expression in brain tissue. Independent replication is limited.

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Selank comes from a specific place and a specific program. The Institute of Molecular Genetics in Moscow spent decades designing short peptides based on fragments of natural proteins, stabilized with proline-rich tails. Selank is one result of that work, and it is registered as a medicine in Russia.

Outside Russia the picture is different. Selank has not been approved by the FDA, the EMA, or any regulator in Latin America. Most of the published studies are small, come from within the same research network, and appear in Russian-language journals. Independent replication outside that network is limited, and there are no large controlled trials of the kind Western regulators require.

That’s the honest summary: a real and long-running body of work, concentrated in one country, and not independently confirmed elsewhere.

Selank holds no registro sanitario with Costa Rica’s Ministerio de Salud. It is supplied here as a research material and nothing else.

Questions about Selank pricing, vial size, batch documentation, storage, or delivery inside Costa Rica? Our team can confirm current stock, bulk pricing and what the Certificate of Analysis covers before you order.

Selank is a fully defined seven-residue peptide with a documented design history, a known parent molecule and a clearly stated regulatory position.

We supply high-purity Selank and other research peptides with consistent quality, transparent pricing, and reliable local delivery. Every order ships from inside Costa Rica — no customs delays, no import duties.