Selank
A synthetic analog of tuftsin, a small immune peptide your body already makes. People run it for calmer, clearer thinking, taking the edge off anxiety without the sedation of a benzodiazepine, often stacked with Semax for focus.
Where to buy Selank, cheapest first.
Prices from 8 vendors across the market. We link straight to each vendor’s product page and grade vendors on public lab data, so you’re not just chasing the lowest number.
Selank
What Selank actually does.
The simple version first, then a little more for the curious. No biochem degree required.
It gently nudges your calming brain chemistry, turning down anxiety without knocking you out, and seems to steady the balance of GABA, serotonin, and dopamine so you feel level rather than sedated.
How it works
Selank is a heptapeptide built from tuftsin with a stabilizing Pro-Gly-Pro tail added so it survives longer. It modulates the GABA system gently and influences serotonin and dopamine turnover, which is the basis for its calming, anti-anxiety reputation.
Where it acts
Taken as a nasal spray, it reaches the brain partly through the nose-to-brain olfactory and trigeminal pathways, bypassing first-pass breakdown. It also slows the enzymes that degrade enkephalins, your body's own mood-regulating peptides.
What people notice
People report feeling calmer, less reactive, and able to think more clearly under stress, without the fog or sedation of a benzodiazepine. Some notice it within an hour; steadier effects build over a couple of weeks.
Honest caveat: most of the human work is older Russian clinical research, and the peptide is an approved medicine in Russia but nowhere else. Outside that, the data is thin and much of it is animal or lab based. It is not an approved medicine in the US and is sold strictly for research use only. None of this is medical advice, talk to a licensed provider before starting anything.
How to take it.
Selank is used as a nasal spray, sprayed into the nostrils, where it absorbs through the nasal lining and partly travels nose-to-brain. It isn't a meaningful oral peptide. Some researchers inject it subcutaneously instead, but intranasal is the established route. The routine is below; for cycling and timing, see the full guide.
Mix into a spray bottle
Reconstitute the vial with bacteriostatic water and transfer it into a small nasal-spray bottle. Work out how many mcg each spray delivers so you can count doses, not guess.
Prime the pump
With a fresh bottle, pump a few sprays into a tissue until a fine even mist comes out. This makes each later spray a consistent dose.
Spray per nostril
Tip your head slightly forward, close one nostril, and spray into the other while breathing in gently. A common setup is roughly 250–300 mcg per spray, one spray per nostril. Don't sniff hard or it runs down your throat.
Alternate nostrils & store cold
Switch which nostril you start with each dose to spread irritation. Keep the bottle in the fridge between uses and out of direct light.
Typical Selank dose: about 250–500 mcg per day intranasally, often split into two doses, run in short courses of roughly 2 to 4 weeks with a break after. It is used in cycles, not continuously.
How to cycle Selank.
How long people run Selank, when to take a break, and the honest reasoning behind it.
Run in short courses with a break.
A cycle just means a defined run of time on the peptide, followed by a break. For Selank the common pattern is a short course of roughly 2 to 4 weeks, then time off, rather than spraying it every day indefinitely.
Why not just run it forever? Mostly because the long-term human safety data outside the Russian program is thin, and short courses match how it was actually studied. The cautious and widely followed approach is to run a focused course, then stop and reassess.
- Hold a steady schedule through your course, once or twice daily at roughly the same times.
- Take a real break after a 2 to 4 week course before starting another, rather than running it continuously.
- Reassess between courses. If anxiety symptoms are persistent or worsening, that is a conversation for a licensed provider, not a longer self-run cycle.
Want the full picture, on and off periods, the washout, stacking, and keeping your results? Read how peptide cycling works →
What's actually in the vial.
For 4 of these vendors we link the per-batch certificate itself (a specific lab report, COA PDF, or certificate image), and the purity below is read straight off that certificate. The rest link to the vendor's general lab-results page. We don't run the labs ourselves and we don't show a purity number unless it's printed on a certificate we link, so you can open the document and check it against the batch yourself.
| Vendor | Purity (per COA) | Batch / report | Certificate |
|---|---|---|---|
| EZ Peptides | 99.589% | EZP-SEL1005192026-08 | Janoshik report ↗ |
| Midwest Peptide | 99.944% | MPSK001 | View COA ↗ |
| Onyx Biolabs | 99.934% | SEL-2026-0320 | View COA ↗ |
| Next Gen Peptides | 99.84% | SL85 | COA (PDF) ↗ |
| Penguin Peptides | see lab page | not shown | Lab results ↗ |
What people pair it with.
Selank is often paired with another Russian nootropic peptide. These are the combinations the community reaches for when calm focus is the goal.
Calm & focus
The classic Russian nootropic pair. Selank takes the edge off anxiety while Semax adds drive and focus, complementary mechanisms that people run together for a steady, clear-headed day. Both are nasal sprays.
View stack →Anxiety & memory
A combo people use when they want the calming side of Selank alongside a memory and learning nudge. Noopept is taken separately; Selank stays on its nasal-spray schedule.
View stack →Calm & gut
Some run Selank for mood and stress alongside BPC-157 for gut and recovery, since stress and gut health often travel together. Two different routes and rhythms, run in the same block.
View stack →In the same corner.
Other cognitive and nootropic peptides people compare against Selank.
Questions, answered straight.
Is Selank legal?
Selank is an approved medicine in Russia but not in the US, where it is not an approved drug and is not sold for human use. The vendors we compare offer it strictly for research use only. It is also likely prohibited in competition under WADA's blanket ban on unapproved substances, so competing athletes should steer clear. Rules vary by country, so check what applies where you are.
What does research use only actually mean?
It means the product is sold for laboratory and research purposes, not as a supplement or medicine for people. It has not been reviewed or approved for human use by the FDA. We aggregate prices and public lab data so you can see the landscape; what you do with that is between you and a licensed provider.
How do I store it?
Keep the sealed, freeze-dried vial in the fridge and out of direct light. Once you mix it with bacteriostatic water and load a spray bottle, store it refrigerated and use it within a few weeks. Don't freeze a reconstituted vial or bottle.
How often do people dose it?
A common pattern is about 250–500 mcg a day intranasally, often split into two sprays, run in short courses of roughly 2 to 4 weeks with a break after. People use it in cycles rather than continuously.
Nasal spray or injection?
Intranasal is the established route, and it is what the Russian clinical work used. The nose-to-brain pathway is part of why people prefer it. Some researchers inject it subcutaneously instead, but for most people the nasal spray is simpler and matches the evidence. It is not a practical oral peptide.