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Cognitive & Nootropic
Well Researched

NA Semax Amidate

NA-SMX

Stabilized analog of Semax.

Also known as: N-Acetyl Semax Amidate

Research dose range100–300 mcg daily (research models)
Route studiedIntranasal / subcutaneous
Study durationDaily, multi-week studies
Storage2–8 °C reconstituted

Overview

N-Acetyl Semax Amidate is a chemically stabilized analog of Semax studied in cognition, neuroprotection, and BDNF-related research with enhanced metabolic stability.

Key research findings

A more stable, potent variant of Semax in which an N-acetyl group and a C-terminal amide protect the peptide from enzymatic breakdown. Research interest centers on a longer duration of action and stronger BDNF-related cognitive and neuroprotective effects than standard Semax.

Mechanism of action

Acetylation and amidation increase resistance to enzymatic breakdown, prolonging the BDNF- and neurotrophic-modulating activity of Semax.

Molecular information

Weight~854 Da
Length7 amino acids (modified)
TypeN-acetyl, C-amidated Semax analog

Terminal modifications increase enzymatic stability and potency versus standard Semax.

Pharmacokinetics

Peak: ~0.25 hoursHalf-life: ~Longer than Semax (terminal protection)Cleared: ~24 hours
Peak · 1hHalf-life · 4h

Illustrative relative-concentration model derived from published pharmacokinetic research. Curve is normalized and provided for educational comparison only — not a dosing schedule.

Research applications

  • Cognitive-enhancement research
  • Neuroprotection studies
  • BDNF-pathway investigations

Research protocols

Protocols summarized from published research models. Provided for scientific reference only — not dosing guidance for human use.

Conservative referenceAmount: 100 mcgFrequency: 1–2× dailyRoute: Intranasal
Standard referenceAmount: 300 mcgFrequency: Daily (divided)Route: Intranasal

Observed effects timeline

Aggregated observations reported across research literature. Timing and magnitude vary by model and are not a guarantee of outcome.

  1. Acute

    Focus and alertness changes reported, with longer duration than standard Semax.

  2. Week 1–4

    BDNF-mediated cognitive and neuroprotective effects reported with continued use.

Research compatibility

Describes how compounds are studied alongside one another in the literature. Not a recommendation to co-administer.

Semax

Same peptide family — redundant activity.

Avoid combination

Selank

Focus plus anxiolytic balance studied together.

Compatible

P21

Complementary neurogenic/BDNF pathways.

Compatible

How to reconstitute

Important

Reconstitute with bacteriostatic water, swirl gently, and refrigerate. Many protocols prepare a metered intranasal spray.

  1. 1Allow the vial to reach room temperature (15–20 minutes).
  2. 2Swab the stopper with alcohol and let it air dry.
  3. 3Add bacteriostatic water slowly down the vial wall.
  4. 4Swirl gently until dissolved into a clear solution.
  5. 5Refrigerate at 2–8 °C and protect from light.
Open reconstitution calculator

Quality indicators

Uniform white powder

Lyophilized cake should be white to off-white without discoloration.

Clear solution

Reconstitutes to a clear, colorless, particle-free solution.

Cold-chain integrity

Reconstituted solution requires 2–8 °C storage.

Slight clumping

Small clumps that dissolve completely with gentle swirling are acceptable — shipping can cause minor compaction.

Collapsed or melted appearance

Powder that looks collapsed, melted, or stuck to the vial walls may have been exposed to heat in transit.

Cloudy after reconstitution

Persistent cloudiness, particles, or precipitate after gentle mixing can indicate a degraded or contaminated peptide.

Reported observations & safety

Safety signals reported in the research literature. Compiled for scientific awareness — not medical advice.

  • Generally reported as well tolerated; nasal irritation is the most common intranasal signal.
  • Evidence largely extrapolates from Semax research plus limited modified-analog data.

References & further reading

Semax analogs and BDNF-mediated neuroprotection (review)

Preclinicalmodified SemaxBDNF

Review of Semax and its stabilized analogs and their BDNF-related cognitive and neuroprotective effects.

View study

Topics

nootropicbdnfneuroprotection

This entry is provided for educational and informational purposes only. It is not medical advice, a dosing protocol, or a claim of therapeutic benefit. Research compounds are supplied strictly for laboratory and research use — not for human or veterinary consumption.

Research level
Well Researched

Substantial peer-reviewed research across multiple models.

Quick reference
Dose range100–300 mcg daily (research models)
RouteIntranasal / subcutaneous
DurationDaily, multi-week studies
Storage2–8 °C reconstituted
Half-life~Longer than Semax (terminal protection)
Catalogue status

This compound is part of our educational reference and is not currently stocked. Browse the catalogue for available research-grade peptides.

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