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A specimen of the Cognitive drawer Drawer E · Cognitive

N-Acetyl Selank Amidate

Research Only

A modified version of Selank with N-terminal acetylation and C-terminal amidation designed to enhance stability and bioavailability. While the parent compound Selank is approved in Russia, N-Acetyl Selank Amidate has no independent clinical research and relies entirely on extrapolated claims from Selank studies.

NA-Selank · N-Acetyl Selank · Acetyl-Selank-Amidate · NASA

Research evidence
Very Low

Preclinical evidence only

Preclinical
100%
Clinical
0%

Based on 2 cited sources

Evidence Score25/100
Preliminary
Research Depth2/100
Mechanism22/100
Plausibility59/100
Global Coverage12/100
Community Experience40/100
Effectiveness25/100

community-reported · not clinically demonstrated · very-low confidence

Demonstrated effect magnitude — not a recommendation or safety claim.

Research Depth 2 (1A 0, 1B 0, 1C 0, 1D 2, 1E 0): zero studies exist on N-Acetyl Selank Amidate itself — the dossier explicitly states no direct research — so all human-evidence elements score 0; only a small indirectness credit (1D) for parent-compound Selank data, which is a different molecule. Mechanism 22 (2A 10, 2B 8, 2C 0, 2D 4): target inferred from the shared Selank core sequence with no binding data on this modification; enkephalinase inhibition (15344652) and BDNF (18841804) characterized for the parent only, no dose-response for this compound. Plausibility 59 (3A 15, 3B 18, 3C 14, 3D 12): anxiolytic claim plausible but hinges on the unproven assumption that N-acetylation/C-amidation preserves activity; coheres with Selank biology, same-class analogy from the parent's GAD RCT (18454096), tightly scoped claim. Global Coverage 12 (4A 3, 4B 4, 4C 5, 4D 0): zero independent research on this molecule; parent literature concentrated in one Russian group; no governance review of this modification. Community Experience 40 (5A 10, 5B 10, 5C 12, 5D 8): niche but persistent nootropic-community use, broadly consistent "longer duration than standard selank" reports, no recurring serious adverse signal over limited exposure. Overall 25 → preliminary. Effectiveness basis community-reported (capped at 50, very-low confidence): no human efficacy data on this compound; CR1 10 + CR2 10 + CR3 5 = 25 from consistent but single-community anecdote.

Scored June 2026 How we rate →
!!
Evidence Level
very low
Not approved for human use by any regulatory agency
Limited human clinical trial data
Consult a healthcare provider before use
Not FDA Approved WADA Prohibited
Identity
SCALE · 1:1 N-TERMINUS C-TERMINUS 7 AA · ~793 Da
Also Known As
NA-Selank • N-Acetyl Selank • Acetyl-Selank-Amidate • NASA
Class
Heptapeptide
Length
7 amino acids
Mol. weight
~793 Da
Sequence
Ac-Thr-Lys-Pro-Arg-Pro-Gly-Pro-NH2
Molecular Structure
Ac-Thr
K
P
R
P
G
P-NH2
Hydrophobic
Polar
Positive
Negative

The proposed mechanisms of N-Acetyl Selank Amidate are extrapolated entirely from the parent compound Selank. No direct research exists on this specific modification.

How It Works (Simplified)

N-Acetyl Selank Amidate is theorized to work through the same pathways as Selank, with potentially enhanced stability:

GABAergic Modulation

Proposed to enhance GABA-A receptor sensitivity, promoting inhibitory neurotransmission and anxiolytic effects (based on Selank data).

Enkephalin Protection

Theorized to inhibit enkephalinase, preserving endogenous opioid peptides involved in mood and stress response.

BDNF Enhancement

Proposed to upregulate brain-derived neurotrophic factor, potentially supporting neuroplasticity and cognitive function.

Enhanced Stability

N-acetylation and C-amidation theoretically protect against aminopeptidase and carboxypeptidase degradation, extending half-life.

Key Research: No direct studies exist on N-Acetyl Selank Amidate. Parent compound data from Zozulia AA et al. (2008) demonstrated Selank anxiolytic effects. PMID:18454096

Important Limitations

  • Zero published studies on N-Acetyl Selank Amidate specifically
  • All mechanisms extrapolated from parent compound Selank
  • Modifications may alter or eliminate biological activity
  • Human pharmacokinetics completely unknown
i. GABAergic Pathway · Anxiolytic - Theoretical
NA-Selank-AmidateGABA-A receptor modulationEnhanced inhibitory signalingReduced anxiety (proposed)
ii. Enkephalin Pathway · Mood - Theoretical
NA-Selank-AmidateEnkephalinase inhibitionPreserved endogenous enkephalinsMood effects
Mechanism GABAergic system modulation enhancing inhibitory neurotransmission
Emerging 0 direct studies
Benefit may reduce anxiety symptoms
Evidence Level
Very Low
2 Animal
Mechanism Enkephalinase inhibition preserving endogenous enkephalins
Emerging 0 direct studies
Benefit suggested to enhance mood and well-being
Evidence Level
Very Low
1 Animal
Mechanism BDNF upregulation supporting neuroplasticity
Emerging 0 direct studies
Benefit suggested to support cognitive function
Evidence Level
Very Low
1 Animal
Mechanism Terminal modifications (N-acetylation, C-amidation) reducing enzymatic degradation
Emerging 0 direct studies
Benefit may improve stability and bioavailability
Evidence Level
Very Low
Mechanism Confidence
Established
Supported
Emerging
Evidence Level
High
Moderate
Low
Very Low

Reported positives

  • Longer-lasting effects than standard selank reported
  • Enhanced bioavailability from modified form
  • Anxiolytic effects without cognitive impairment
  • Stable nasal spray formulation

Reported negatives

  • More expensive than standard selank
  • Limited availability compared to standard form
  • Long-term safety data lacking
  • Subtle effects may not meet expectations

“Preferred by some over standard selank for longer duration. Niche following in nootropic communities.”

Self-reported, unverified accounts — not clinical evidence and no substitute for the cited research. Anecdotes are prone to selection bias and placebo effects.

Phase 01 1
Week 1-2

Based on parent compound data: Users report initial anxiolytic effects within days. No pharmacokinetic data exists for NA-Selank-Amidate to confirm onset timing.

PMID:18454096
Phase 02 2
Week 2-4

Theoretical continued GABAergic modulation and enkephalin protection. Parent compound studies suggest sustained anxiolytic effects with continued use.

PMID:18454096
Phase 03 3
Week 4-8

Long-term effects completely unknown. No studies on extended use of either Selank or NA-Selank-Amidate beyond short-term trials.

PMID:18454096
Phase 04 4
Week 8+

No data available. Human pharmacokinetics, tolerance development, and optimal treatment duration are completely unknown for this modification.

Research-based observations

This timeline reflects observations from published clinical and preclinical studies. Individual responses may vary significantly. This is not a guarantee of effects or a dosing schedule. Consult qualified healthcare providers for personalized guidance.

Good Signs (6 indicators)
White to off-white lyophilized powder
Dissolves completely and quickly in bacteriostatic water
Clear, colorless solution after reconstitution
Comes with certificate of analysis (COA) showing >98% purity
Third-party HPLC and mass spectrometry verification available
Proper vacuum seal on vial before reconstitution
Warning Signs (5 indicators)
Slightly off-white or cream-colored powder (may still be acceptable)
Takes longer than expected to fully dissolve
Powder appears collapsed or melted (possible moisture exposure)
COA from manufacturer only without third-party verification
Purity listed below 98% but above 95%
Bad Signs (6 indicators)
Yellow, brown, or otherwise discolored powder
Visible particles or cloudiness after reconstitution
Gel-like consistency or clumping that won't dissolve
No COA provided or COA appears fraudulent
Strong unusual odor
Vial seal appears compromised or previously opened
Positive quality indicator
Requires evaluation
Potential quality issue

For Research Evaluation Only

These quality indicators are general guidelines based on typical peptide characteristics. Professional laboratory testing (HPLC, mass spectrometry) provides definitive quality verification. This checklist is for initial visual evaluation only.

Synergistic
Compatible
Caution
Avoid

Parent compound with identical core sequence. NA-Selank-Amidate may have improved stability but shares the same mechanisms. No studies on combining the two forms.

Both are modified Russian nootropic peptides targeting different pathways. Semax focuses on BDNF/NGF while Selank emphasizes GABAergic modulation. Commonly stacked in nootropic protocols.

Semax

Compatible
Compatible

Different mechanisms of action. Semax targets neurotrophic factors while Selank focuses on anxiolytic pathways. No known contraindications.

Both target cognitive pathways through different mechanisms. Limited safety data on combination. Exercise caution due to lack of interaction studies.

Research Note: Interaction data is based on published literature, mechanistic understanding, and theoretical considerations. Most peptide combinations lack direct clinical study. This information is for educational purposes only and does not constitute medical advice. Always consult qualified healthcare providers.

This dossier synthesizes available evidence from peer-reviewed literature, regulatory documents, and clinical trial registries. Evidence strength ratings follow a modified GRADE approach.

For complete methodology details, see our Methodology page.

Important Disclaimer

This dossier is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making health decisions.

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