# N-Acetyl Selank Amidate

Stabilised, stronger Selank variant for anxiety; less data, more side reports.

- Page: https://peprank.xyz/peptides/n-acetyl-selank-amidate
- Category: Mood & anxiety (Research peptide)
- Also known as: NA-Selank-Amidate; NA-Selank
- Routes: Nasal / Injection
- Sequence: TKPRPGP (N-acetyl, C-amide)
- Safety tier: Strict: Caution · Balanced: Caution · Evidence only: Clean
- Risk axes (0 none to 3 severe): Seen harm 0, Mechanism 1, Data gap 3, Silent harm 1, Product 2
- Positive: 48% of 21 graded reports glowing or positive, shrunk toward the 49% all-report average by 8 reports' weight
- Rank: #17 of 61 research peptides
- Graded reports: 21 (Glowing 1, Positive 9, Mixed 4, Nothing 5, Negative 2)
- Evidence: No studies of its own — For the modified form (parent Selank is approved in Russia)
- Access: Grey market
- Onset: Minutes to an hour, like plain Selank; nasal users often need several sprays to notice anything.
- Lasts: About 6-8+ hours per dose by user accounts, against 4-5 hours for plain Selank.
- Cost per month: ≈ €27–72 (researchers' estimate)
- Updated: 2026-10-30

## What users report

Fewer reports than plain Selank. Fans describe stronger anxiolysis per spray; others note a morning-after hangover, lowered libido, or the same 'out of it' reactions as Selank. Roughly 35-45% feel little.

**Effects:** anxiolysis at lower dose than Selank; calm during social situations; stacks with GB-115 for anxiety

**Downsides:** next-morning hangover/grogginess; lowered libido (isolated reports); dizziness or emotional lability after a strong first dose

**Caveat:** No specific harm path, but no clinical data on the modified molecule and dosing is easy to overshoot.

**Typical use:** 150-300 mcg/day nasal; start below plain-Selank doses.

**Getting it:** Research-chemical nasal sprays and lyophilized vials only; the modified molecule is not approved anywhere.

**Stacked with:** NA-Semax-Amidate (The usual pairing, often sold as a combined spray: NA-Semax for drive in the morning, NA-Selank to calm in the evening.); GB-115 (Combined or used situationally for anxiety; users say NA-Selank calms thoughts while GB-115 relaxes the body.); PE-22-28 (Occasional subq pairing for stress resilience; anecdotal only.)

## Risk profile

- **Seen harm 0/3:** About twenty first-hand reports describe grogginess, fog and, after one likely mega-dose, a few days of dizziness and emotional lability; none serious. The zero reflects community use only.
- **Mechanism 1/3:** Selank's sequence with capped ends, so the same speculative GABA-A and enkephalinase effects; no harm pathway is known.
- **Data gap 3/3:** No human or toxicology data exist for the modified molecule; plain Selank's small Russian trials bridge only partly, because capping is meant to change potency and duration.
- **Silent harm 1/3:** Reported effects are felt within hours and resolve within days of stopping.
- **Product 2/3:** Research-chemical nasal sprays and lyophilised vials only, some injected.
- **Never if:** Pregnancy or breastfeeding (no human reproductive data)

## Top reports

- Glowing, social: “I've used N-Acetyl-Selank from science(dot)bio in conjunction with naSemax and found to to dramatically reduce and pretty much eliminate social anxiety.” — [r/NooTopics](https://www.reddit.com/r/NooTopics/comments/13lpbv7/does_anyone_has_experience_with_selank/jkrh0ko/)
- Positive, anxiety: “So far the N acetyl Selank amidate nasal spray I made helps with GAD but none of the supplements or anything else really works for me besides phenibut and alcohol” — [r/NooTopics](https://www.reddit.com/r/NooTopics/comments/1kavggk/gb115_benzodiazepines_are_over_everychem_agenda/mqqwp00/)
- Positive, anxiety, 1 mg/day: “I've tried semax /selank and also na semax /na selank. Feeling wise, they are identical. Just the na versions last longer. Like 8 hours or more for the na versions Vs the normal versions like 4-5 I think.” — [r/NooTopics](https://www.reddit.com/r/NooTopics/comments/1vriyp0/selanksemax_vs_na_selankmax_vs_na_selankmax/p4eew1l/)
- Positive, anxiety: “I don’t understand how ppl rate it higher than NA selank, when selanks effects are immediate.” — [r/NooTopics](https://www.reddit.com/r/NooTopics/comments/1pghvoj/when_to_expect_anxiolytic_effects_from_gb115/nstj2fa/)
- Positive, focus: “The NA-Selank, first 2 bottles I tried, were “calm focus”. I liked that. You weren’t extra tired. You could still work but in a much more chill flow state. Absolutely awesome.” — [r/NooTopics](https://www.reddit.com/r/NooTopics/comments/13lpbv7/does_anyone_has_experience_with_selank/jld8zi6/)

## Cheapest in Europe

- [Baltic Peptides](https://balticpeptides.com/product/n-acetyl-selank-amidate/) (LT): N-Acetyl Selank Amidate 30mg (Vial), €60, €2.00/mg
- [Baltic Peptides](https://balticpeptides.com/product/n-acetyl-selank-amidate/) (LT): N-Acetyl Selank Amidate 30mg (Nasal Spray), €65, €2.17/mg (contents not stated on the page)
- [Baltic Peptides](https://balticpeptides.com/product/n-acetyl-selank-amidate/) (LT): N-Acetyl Selank Amidate 10mg (Nasal Spray), €40, €4.00/mg (contents not stated on the page)
- [Modern Peptides EU](https://modernpeptides.eu/product/na-selank/) (DE): NA Selank, €45, €4.50/mg

## Studies

- [Zozulia et al.: Selank vs medazepam in generalized anxiety disorder and neurasthenia (parent Selank)](https://pubmed.ncbi.nlm.nih.gov/18454096/) (controlled, n=62, 2008): Plain Selank matched medazepam for anxiety with added anti-fatigue effects; no trial has tested the acetylated, amidated form.
- [Medvedev et al.: Anxiolytic effect and tolerability of Selank vs phenazepam (parent Selank)](https://pubmed.ncbi.nlm.nih.gov/25176261/) (controlled, n=60, 2014): Plain Selank gave pronounced anxiolysis lasting about a week after stopping; the human evidence the modified form borrows.
- [Volkova et al.: Selank and GABAergic gene expression in rat cortex (parent Selank)](https://pubmed.ncbi.nlm.nih.gov/26924987/) (animal, 2016): Plain Selank shifted neurotransmission genes like GABA did, suggesting GABA-A modulation; caps on the ends are meant only to slow its breakdown.

## Sources

- [FDA: Bulk drug substances that may present significant safety risks (Category 2 / withdrawn list, Apr 2026)](https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks)
- [Mendias & Awan 2026 preprint: 6441 grey-market peptide samples, 41.6-71.1% failed quality criteria, 15% endotoxin](https://europepmc.org/article/PPR/PPR1182497)