Semax vs Selank Buyer Guide: Focus, Calm, Blend Math, COA Checks, and Price Per Mg

Short Answer

Pick Semax when the buying goal is sharper focus, cognition, BDNF signaling, and neuroprotection research. Pick Selank when the goal is calmer stress response, anxiety-oriented research, GABA-related signaling, enkephalinase inhibition, and non-sedating calm. Pick the Semax + Selank blend when you want both lanes covered in one vial and the vendor can prove both components.

Do not treat them as interchangeable nootropic peptides. Semax and Selank are both Russian-developed heptapeptides, and both are commonly sold as lyophilized research products or blend products, but the buyer questions are different.

Start with the PeptidePub workflow: compare /prices/semax, /prices/selank, and /prices/semax-selank-blend, then check /vendors and /methodology before applying any discount code. If the decision turns on concentration, BAC-water math, or value after reconstitution, use /tools/reconstitution-calculator for concentration math and /tools/cost-per-dose for value comparison.

What Buyers Are Actually Comparing

Semax is Met-Glu-His-Phe-Pro-Gly-Pro, a synthetic ACTH(4-10) analog with a Pro-Gly-Pro tail designed to improve stability while removing adrenal-stimulating ACTH activity. It was developed in Russia in the late 1980s and 1990s, registered there since the mid-1990s, and is usually known in medical form as a nasal spray.

Selank is Thr-Lys-Pro-Arg-Pro-Gly-Pro, a stabilized tuftsin analog also called TP-7 or Selanc. It was engineered by the Institute of Molecular Genetics of the Russian Academy of Sciences and has been approved in Russia since 2009 as a prescription anxiolytic for generalized anxiety disorder and neurasthenia, typically as a nasal spray.

Plain English: Semax is the focus and neuroprotection lane. Selank is the calm and stress-resilience lane. The Semax + Selank blend is the convenience lane.

Product form matters. Standard Semax, N-Acetyl Semax, N-Acetyl Semax Amidate, Selank vials, nasal sprays, and Semax + Selank blends are different purchases with different COA questions. Buy the exact product you mean to compare.

Evidence Snapshot

Semax has the cleaner focus and BDNF story. Dolotov et al. 2006 gave rats one Semax application at 50 micrograms/kg and found a maximal 1.4-fold increase in BDNF protein, a 1.6-fold increase in TrkB tyrosine phosphorylation, a 3-fold increase in exon III BDNF mRNA, and a 2-fold increase in TrkB mRNA in the rat hippocampus.

The human anchor is Gusev et al. 2018: 110 ischemic-stroke patients, 43 men and 67 women, mean age 58.0 plus or minus 9.7 years, with early rehabilitation at 89 plus or minus 9 days and late rehabilitation at 214 plus or minus 22 days. Semax was used as 2 courses of 6000 micrograms/day for 10 days with a 20-day interval. In that studied stroke population, Semax plus early rehab increased plasma BDNF, accelerated functional recovery, improved motor performance, and improved Barthel index outcomes.

Selank has the cleaner calming story. Zozulya et al. 2001 reported dose-dependent inhibition of plasma enkephalin hydrolysis with IC50 15 microM, more potent than bacitracin and puromycin in that assay. Inozemtseva et al. 2008 reported that intranasal Selank regulates BDNF expression in the rat hippocampus in vivo.

Price Comparison: Semax

Semax has a wide tracked price spread. PeptidePub catalog offers read 2026-07-19: Ascension 10 mg $59.99; AMP 10 mg $44; Atomik 10 mg $35 and 30 mg $90; EZ 10 mg $44; Glacier 10 mg $40.99; Improved 10 mg $49; Main 5 mg $44.99, 10 mg $59.99, and 30 mg $74.99; MD Innovative 10 mg $70; Mile High 10 mg $39.99; Valkyrie 10 mg $75; Aero 10 mg $44.99; World Wide 5 mg $84 and 10 mg $152; Double R Labs 10 mg $35.99; Peptide Society 10 mg $39.99; Viper 10 mg $49.99.

Useful checkpoints: Main 30 mg at $74.99 is about $2.50 per mg. Atomik 30 mg at $90 is $3.00 per mg list and $2.55 after PEPTIDEPUB15. Atomik 10 mg at $35 is $3.50 per mg list and $2.975 after 15% off. Double R 10 mg at $35.99 is about $3.60 per mg. Peptide Society and Mile High 10 mg at $39.99 are about $4.00 per mg before code. AMP and EZ 10 mg at $44 are $4.40 list and $3.96 after 10% off. Glacier 10 mg at $40.99 is about $4.10 list and $3.69 after 10% off. Viper 10 mg at $49.99 is about $5.00 list and $4.25 after 15% off.

Ascension is the standout code example: Semax 10 mg is $59.99 list, about $6.00 per mg, then $29.995 after the confirmed 50% PEPTIDEPUB code, or about $3.00 per mg effective.

Price Comparison: Selank and the Blend

Selank tracked offers read 2026-07-19: Ascension 10 mg $47.50; AMP 10 mg $44; Atomik 10 mg $35; EZ 10 mg $44; Glacier 10 mg $40.99; Improved 10 mg $49; Level Up 10 mg $41; Main 5 mg $39.99 and 10 mg $59.99; MD Innovative 10 mg $70; Mile High 10 mg $39.99; Valkyrie 10 mg $75; World Wide 5 mg $87 and 10 mg $209; Double R 10 mg $35.99; Peptide Society 10 mg $39.99; Viper 10 mg $49.99.

Selank checkpoints: Atomik 10 mg at $35 is $3.50 per mg list and $2.975 after 15% off. Double R 10 mg at $35.99 is about $3.60 per mg. Mile High and Peptide Society 10 mg at $39.99 are about $4.00 per mg, with Peptide Society about $3.20 after 20% off. AMP and EZ 10 mg at $44 are $4.40 list and $3.96 after 10% off. Glacier 10 mg at $40.99 is about $4.10 list and $3.69 after 10% off. Viper 10 mg at $49.99 is about $5.00 list and $4.25 after 15% off.

Ascension Selank 10 mg is $47.50 list, $4.75 per mg, then $23.75 after the 50% PEPTIDEPUB code, or $2.375 per mg effective.

Blend offers: AMP 20 mg $88; Atomik 20 mg $80; EZ 20 mg $88; Glacier 20 mg $81.99; Mile High 20 mg $89.99. That is about $4.00 to $4.50 per total mg before codes, with Atomik at $3.40 after 15% off and AMP or EZ at $3.96 after 10% off if code applies.

Single Vials vs Semax + Selank Blend

Single Semax and Selank vials are the cleanest buy when you want separate identity, separate amounts, and easier COA reading. A vendor can show a Semax report for the Semax vial and a Selank report for the Selank vial, and the buyer can compare each product against /prices/semax and /prices/selank.

A Semax + Selank blend is the convenience buy when the goal is focus plus calm. The math should be treated as total stated mg unless the vendor discloses the component split and the COA supports both peptides. A total-purity number alone is weaker for a blend than a component-specific report.

Mile High Compounds is a useful product-page example, not proof for every vendor. Its Semax/Selank Blend page accessed 2026-07-19 listed $89.99 sale from $109.99, 377 in stock, 10 mg Semax plus 10 mg Selank, 20 mg total, lyophilized in a 3 mL glass vial. It also listed 99%+ verification by HPLC and mass spectrometry for each component, plus HPLC, mass spectrometry, 14-day sterility, endotoxin analysis, 4-vial batch conformity, and heavy-metal screening. Quantity pricing was $85.49 for 4-5 vials, $80.99 for 6-9, and $76.49 for 10 or more.

Compare the blend against buying one Semax vial plus one Selank vial. When vial size, blend split, reconstitution volume, or price per draw changes the decision, run the math through /tools/cost-per-dose and /tools/reconstitution-calculator.

COA, Vendor, and Deal Workflow

For Semax, the COA should match the exact product: standard Semax, N-Acetyl Semax, N-Acetyl Semax Amidate, or another clearly named variant. A generic Semax label should not prove a modified analog. For Selank, the COA should identify Selank or TP-7 and match the vial size. For a Semax + Selank blend, the stronger COA names both peptides and shows identity and amount for each component where available.

A strong report shows batch or lot match, named third-party lab, report date, identity by LC-MS or mass spectrometry, purity by HPLC or UPLC, net content or fill amount, and contaminant checks when available. PeptidePub Testing Score checks 7 items: net content, purity, identification, heavy metals, sterility, endotoxins, and contaminant screening. Use /blog/how-to-read-peptide-coa-before-you-buy and /methodology before checkout.

Then apply deals. Ascension has PEPTIDEPUB confirmed at 50% off, ships from the USA, uses Kovera Labs in catalog data, has 77 COA records, and is COA verified true. The affiliate route is /go/bodybuilding-health after price and proof pass.

Peptide Society has PEPTIDEPUB at 20% off, ships from San Diego, uses IS-Lab in catalog data, and is COA verified true. Viper has PEPTIDEPUB at 15% off, Freedom Diagnostics listed, and is COA verified true.

Red flags: no batch number, no named lab, no identity test, no vial-size match, blend COA without both components, modified Semax variant not named, nasal-spray concentration without clear mg total, and a cheap price that cannot prove amount.

FAQ

Is Semax or Selank better for focus? Semax is the better focus-first comparison. Its buyer story is ACTH(4-10) analog structure, BDNF and TrkB signaling, neuroprotection, and Russian stroke-recovery research.

Is Semax or Selank better for calm? Selank is the better calm-first comparison. Its buyer story is tuftsin analog structure, GABA-related signaling, enkephalinase inhibition, and Russian anxiety-use context.

Is a Semax + Selank blend cheaper than separate vials? It depends on the vendor, component split, and discount. PeptidePub blend offers run from $80 to $89.99 for 20 mg total, or about $4.00 to $4.50 per total mg before codes. Ascension separate Semax 10 mg plus Selank 10 mg is $107.49 list and $53.745 effective after the 50% PEPTIDEPUB code, or about $2.69 per total mg effective.

What should a Semax or Selank COA show? Exact peptide or variant name, matching batch, named lab, report date, identity, purity, net content, and ideally contaminant checks. Blends should name both Semax and Selank.

Where should buyers compare prices? Use /prices/semax, /prices/selank, /prices/semax-selank-blend, /vendors, and /tools/cost-per-dose before checkout.

Bottom Line

Semax is the focus and neuroprotection buy. Selank is the calm and stress-resilience buy. The Semax + Selank blend is the convenience buy when the vendor clearly verifies both components.

The strongest purchase is not the loudest nootropic claim. It is the vial or blend with exact identity, batch-specific COA documentation, component-level proof when needed, and the best effective price after real discounts.

For separate vials, Ascension is hard to ignore after the confirmed 50% PEPTIDEPUB code: about $3.00 per mg effective for Semax 10 mg and $2.375 per mg effective for Selank 10 mg. For blends, Atomik at $80 for 20 mg is the lowest tracked list benchmark at $4.00 per total mg before code, while Mile High gives a useful disclosed-split example at $89.99 for 10 mg Semax plus 10 mg Selank.

Make the PeptidePub reflex automatic: compare the price, verify the COA, check the vendor, use the calculator when math matters, then buy the Semax, Selank, or blend option with the strongest verified value. Start at /prices, use /vendors for proof, read /peptides/semax and /peptides/selank for compound context, and check /blog/how-to-read-peptide-coa-before-you-buy before the cart becomes final.