Buy Nootropic & Cognitive Peptides
Buy Semax, Selank, DSIP, PE-22-28 and P21 — the cognitive, mood and sleep peptide shelf.
All Nootropic & Cognitive Products
9 compounds available · ≥98% HPLC verified · Ships from Phiogen
Buy Nootropic & Cognitive Peptides
This shelf covers the four most-shopped cognitive use-cases: focus and stimulation (Semax), anxiety and stress (Selank), sleep architecture (DSIP), and mood/depression (PE-22-28, P21).
What To Buy For Each Use-Case
| Goal | Buy | Why |
| Focus, attention, BDNF elevation | N-Acetyl Semax Amidate 30 mg ($134.99) | Most stable Semax variant, intranasal-friendly |
| Anxiolysis without sedation | NA-Selank Amidate 30 mg ($161.99) | Most stable Selank variant, GABA-system modulation |
| Sleep onset / depth | DSIP 10 mg ($71.99) | Pulsatile sleep peptide, no morning grogginess |
| Antidepressant research | PE-22-28 10 mg ($71.99) | TREK-1 channel inhibitor, fast-acting class |
| General cognitive bioregulator | P21 10 mg ($80.99) | Pinealon family, broad CNS signalling |
| Standard Selank (cheaper) | Selank 10 mg ($62.99) | Non-acetylated, shorter half-life |
Why The N-Acetyl Variants?
The acetylated, amidated forms (NA-Semax, NA-Selank) are the most-shopped variants in this category for one reason: they survive the nose-to-brain route. Standard Semax and Selank are degraded by aminopeptidases within minutes; the N-acetyl modification blocks N-terminal cleavage and the C-terminal amide blocks C-terminal cleavage. The result: a peptide that actually reaches the CNS via intranasal delivery, which is the published research route.
We still stock standard Selank 10 mg ($62.99) for buyers who specifically want the non-acetylated form (for example, comparison studies or buyers using IV routes where serum stability matters less).
DSIP: Three Vial Sizes
Delta Sleep-Inducing Peptide is sold in three sizes:
- DSIP 5 mg — $44.99 ($9.00/mg)
- DSIP 10 mg — $71.99 ($7.20/mg)
- DSIP 15 mg — $89.99 ($6.00/mg)
Reconstitution & Storage
All cognitive peptides ship lyophilized. After reconstitution, refrigerate and use within 28 days. For intranasal protocols, most researchers reconstitute with bacteriostatic water and dispense via a metered-dose nasal sprayer (sold separately from medical-supply vendors). Sealed lyophilized vials are stable at − 20 °C for 24+ months.
Shipping
Free shipping kicks in at $200 — a single NA-Selank 30 mg ($161.99) plus a DSIP 5 mg ($44.99) gets you over the line and lands you a complete focus-and-sleep research kit.
Buying Questions
Everything you need to know before placing your Nootropic & Cognitive order.
What's the difference between Semax and N-Acetyl Semax Amidate?
Standard Semax is degraded by peptidases within minutes of administration. The N-acetyl group blocks N-terminal cleavage; the C-terminal amide blocks C-terminal cleavage. The result is a peptide that survives long enough in nasal mucosa and serum to actually reach the CNS — which is why almost all published nasal-route research uses NA-Semax Amidate, not standard Semax.
Which Selank should I buy?
For intranasal research, NA-Selank Amidate (30 mg, $161.99) is the right buy — it survives the nasal mucosa peptidase environment. For IV or sublingual research where stability matters less, standard Selank 10 mg at $62.99 is fine. Most consumer-research buyers use the intranasal route, so NA-Selank is the bestseller.
Is DSIP the same as a sleeping pill?
No. DSIP doesn't act on GABA receptors like benzos or Z-drugs. It's a pulsatile peptide that influences sleep architecture — reported research effects include faster sleep onset and increased delta-wave activity, without next-day sedation. It is dosed in micrograms (typical research range 100–300 mcg), so a single vial lasts a long time.
What does PE-22-28 do?
PE-22-28 is a TREK-1 potassium channel inhibitor — the same target class as the rapid-acting antidepressant research compounds. It is reportedly a peptide derivative of spadin. Sold in 10 mg lyophilized vials at $71.99. It is the cheapest entry into the antidepressant-mechanism research category on the site.
Can I stack these with GLP-1 or recovery peptides?
Yes — cognitive peptides are typically intranasal, while GLP-1 and recovery peptides are subcutaneous. Different administration routes, no interaction concerns documented in the published literature. Many buyers add a Semax/Selank pair to a GLP-1 or recovery order to reach the $200 free-shipping threshold.
Buy Nootropic & Cognitive Peptides — Shipped From Phiogen
9 Nootropic & Cognitive products in stock. ≥98% HPLC purity, original lot CoA, free US shipping over $200.