Selank
Selank is a synthetic heptapeptide, sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro, molecular weight about 752 and CAS number 129954-34-3. It was designed in Moscow as a stabilized version of tuftsin, a four-residue fragment of an antibody protein. Buy research-grade Selank in Costa Rica for ₡40,903 per 10mg vial. Transparent pricing, no customs fees, 2–4 day local delivery, and 15% off when you order five or more vials
Buy Selank Peptides: Research Grade & Lab Tested
Selank is a seven-residue peptide with an unusual parent. Its first four residues, Thr-Lys-Pro-Arg, are tuftsin, a short fragment released from the heavy chain of immunoglobulin G, the most common antibody in blood. Tuftsin was identified at Tufts University in the 1970s, which is where its name comes from.
Tuftsin itself is broken down very quickly. The three residues added to Selank’s tail, Pro-Gly-Pro, slow that down. It’s the same stabilizing trick used in several peptides designed by the same group.
That group was at the Institute of Molecular Genetics of the Russian Academy of Sciences in Moscow, working through the 1980s and 1990s. Selank is a registered prescription medicine in Russia. It is not approved by the US FDA, the European Medicines Agency, or Costa Rica’s Ministerio de Salud.
At Peptides Costa Rica it comes as a 10 mg lyophilized vial, stored refrigerated at 2–8°C, with a Certificate of Analysis for your batch. Delivery takes 2–4 business days from stock held inside Costa Rica, with no customs and no import fees.
Selank Price in Costa Rica
Selank is available in a single 10mg vial at Peptides Costa Rica:
- Selank 10mg — ₡40,903 (₡4,090.30 per mg)
With the 15% bulk discount on 5+ vials of the same product, the per-vial cost drops to ₡35,190 — a saving of ₡31,050 on a five-vial order (₡207,000 down to ₡175,950). Selank is frequently studied alongside Semax (both Russian nootropic peptides at the same ₡41,400/10mg price point) — pairing both in one order alongside BAC Water crosses the ₡92,000 free-shipping threshold.
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.
Why Choose Peptides Costa Rica’s Selank Peptides?
We supply research materials with published batch documentation, transparent pricing, fast domestic delivery, and someone on the other end of the phone when you have a question.
Selank Research Overview
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.
Get In Touch
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.
Why Researchers Choose Selank
Selank is a fully defined seven-residue peptide with a documented design history, a known parent molecule and a clearly stated regulatory position.
01
Defined Sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro, molecular weight about 752, CAS 129954-34-3, confirmed on every batch certificate
02
Derived From Tuftsin
Built on tuftsin, a four-residue fragment of immunoglobulin G described in the 1970s.
03
Designed for Stability
The Pro-Gly-Pro tail slows the enzymatic breakdown that clears tuftsin within minutes.
04
Reliable Supply
Trusted Source for Research Peptides
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.
Bulk Savings
Save more with bulk purchases. Buy five or more vials of the same product and get 15% off with clear, upfront pricing and no hidden conditions.
Simple Ordering Process
Place orders through a simple process—review products, confirm availability, choose your payment method, and arrange delivery within Costa Rica.
Flexible Payment Options
Choose from secure payment options including SINPE Móvil, Zelle, or cash for smooth and convenient transactions.
Transparency & Documentation
We provide Certificates of Analysis along with clear communication, verified stock, and straightforward pricing for complete trust.
Frequently Asked Questions
Selank is a synthetic seven-residue peptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro, molecular weight about 752, CAS 129954-34-3. Its first four residues are tuftsin, a fragment of immunoglobulin G. It was designed in Moscow and is registered as a medicine in Russia only. It's supplied here as a 10 mg lyophilized vial for laboratory research only.
Selank is priced at ₡40,903 per 10mg vial at Peptides Costa Rica, in USD. With a 15% bulk discount on orders of five or more vials, the per-vial cost drops to ₡35,190 — a saving of ₡31,050 on a five-vial order. Pairing a Selank vial with Semax, BAC Water, or another nootropic in one order crosses the ₡92,000 free-shipping threshold.
Different parent molecules, same design idea. Selank is built on tuftsin, a fragment of an antibody protein. Semax is built on a fragment of ACTH, a pituitary hormone. Both come from the same Moscow program, and both have a Pro-Gly-Pro tail added for stability. Both are stocked here. See the Semax page for its own specifications.
They are not related molecules unlike many unverified claims list them. Selank is a seven-residue peptide derived from tuftsin, an antibody fragment. DSIP is a nine-residue peptide first isolated from rabbit brain tissue in the 1970s. They share no sequence and no common origin. Both are stocked here. See the DSIP page for its own specifications.
It's used as a tool compound in peptide research: studying how proline-rich tails affect how long a short peptide survives, and how tuftsin-derived sequences behave compared with tuftsin itself. Published work is mostly rodent studies and small clinical studies from Russian groups. It has no approved use outside Russia.
Less than the marketing around it suggests. Selank has no single identified receptor. Proposed mechanisms in the literature include effects on the breakdown of enkephalins, short peptides found in the brain, and changes in gene expression in brain tissue. None has been established as the main route, and the mechanism remains an open question.
Unreconstituted Selank vials should be stored refrigerated at 2–8°C in lyophilized (powder) form, protected from light and moisture. Freezing is suitable for long-term storage. Once reconstituted with bacteriostatic water, keep the solution refrigerated and use within the timeframe outlined in your research protocol. Selank has been studied with both subcutaneous and intranasal administration routes — handling should align with the chosen protocol.
Orders inside Costa Rica are typically delivered within 2–4 business days from order placement. You'll receive tracking once shipped — no customs delays or import fees.
