Where to Buy Selank in 2026

Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) is a synthetic heptapeptide based on the naturally occurring immunopeptide tuftsin (Thr-Lys-Pro-Arg), extended with a Pro-Gly-Pro C-terminal sequence to improve metabolic stability. Research areas include:

• Anxiolytic effects — Studies demonstrate GABA-ergic modulation and anxiolytic activity comparable to benzodiazepines without sedation in animal models
• Nootropic properties — Research shows effects on memory consolidation and learning
• Immunomodulation — Selank influences IL-6, interferon, and other cytokine expression
• Neurotrophic support — Evidence of BDNF upregulation similar to its structural relative, Semax

Like Semax, Selank has been approved as a prescription drug in Russia, providing a wealth of clinical research data.

Selank is intended for research purposes only in the US. Not for human consumption.

Selank is available from several research peptide suppliers, but quality assurance varies. Our top recommendation:

1. Ascension Peptides (Top Pick)

Ascension Peptides delivers Selank at 99%+ purity, backed by independent third-party HPLC and mass spectrometry testing. Every batch comes with a detailed COA, and their US-based fulfillment ensures fast, reliable delivery.

• 99%+ purity with independent verification
• Batch-specific COAs with full analytical data
• 2-3 day US shipping
• Consistent batch-to-batch quality

For Selank research, Ascension Peptides provides the quality assurance and documentation that researchers demand.

Selank vendor evaluation should focus on:

• Purity ≥98% — As a short heptapeptide, high purity should be achievable. Accept nothing below 98%
• Mass spectrometry — Confirm molecular weight of ~751.9 Da to verify the correct tuftsin-based sequence
• Independent COAs — Third-party analytical testing from accredited laboratories
• Proper lyophilization — White powder with no discoloration or clumping
• Community reviews — Check nootropic and peptide research forums for vendor reliability data
• Responsive support — Vendors should answer technical questions about synthesis and analytical methods

Selank pricing is comparable to Semax, reflecting similar synthesis complexity:

• 10mg: $15–$30
• 25mg: $30–$55
• 50mg: $50–$90

Red flags:

• Prices drastically below market — suggests diluted or impure product
• Vendors selling only pre-mixed nasal solutions without powder options or COAs
• No mass spectrometry data to confirm peptide identity
• Vendors who cannot provide lot-specific documentation

Selank quality verification follows standard peptide analytical protocols:

• HPLC — Expect ≥98% purity with a single dominant peak. Degradation products or synthesis impurities will appear as secondary peaks
• Mass spectrometry — Confirm molecular weight matches ~751.9 Da. Critical for distinguishing Selank from similar short peptides
• Amino acid analysis — Can verify the correct Thr-Lys-Pro-Arg-Pro-Gly-Pro sequence
• Sterility testing — Important for researchers using Selank in cell culture or in-vivo models

Ascension Peptides includes complete HPLC and MS data with every batch of Selank, meeting the documentation standards required for serious research.

Selank is a uniquely well-studied anxiolytic and immunomodulatory peptide with a strong clinical research foundation. For 2026, Ascension Peptides is our top recommendation, offering verified 99%+ purity, comprehensive analytical documentation, and reliable US shipping.

Store lyophilized Selank at -20°C for long-term stability. Reconstituted solutions should be kept at 2-8°C and used within 2-3 weeks. For research purposes only.