Semax
ACTH-fragment neuropeptide.
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For research and laboratory use only. Not for human or veterinary consumption.
About this compound
Semax is a synthetic peptide derived from a fragment of the adrenocorticotropic hormone (ACTH) sequence, modified with a stabilizing tail to extend its activity in research conditions. Developed within the Russian neuropeptide research tradition, it has accumulated an extensive body of Russian-language literature spanning cognition, neuroprotection, and brain-signaling pathways. Semax is widely regarded as one of the flagship nootropic peptides studied in that scientific community.
What makes Semax especially prized in research is its reputation as a cognitive and neuroplasticity-focused compound. It is investigated for supporting learning, memory, attention, and mental endurance, and for its influence on the growth-factor signaling that underpins resilient, adaptable neural networks. Unlike the parent ACTH fragment, Semax is studied specifically for these neuroactive properties rather than hormonal ones.
Supplied as a stable lyophilized powder for laboratory reconstitution, this listing is intended strictly for research use only (RUO) and is not for human or animal consumption.
Research overview
ACTH-fragment origin
Semax is built from a short fragment of the ACTH peptide, re-engineered with a stabilizing C-terminal tail to resist rapid degradation. This modification strips away the hormonal axis of the parent molecule while preserving and extending its neuroactive character. The result is a peptide purpose-built for research into central nervous system signaling rather than endocrine effects.
BDNF & NGF signaling
A central theme in Semax research is its influence on neurotrophic factors, particularly brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF). These growth factors are key drivers of neuronal survival, connectivity, and plasticity. Semax's reported ability to support this signaling is a primary reason it is studied as a neuroplasticity-promoting candidate.
Cognition & memory
Semax is most celebrated in the literature for its cognitive profile, where it is explored for supporting learning, memory consolidation, and attention in research models. Investigators are drawn to its potential to enhance mental performance and information processing without strong stimulant-like side effects. This makes it a recurring subject in studies of nootropic and pro-cognitive compounds.
Neuroprotection & resilience
Beyond enhancing performance, Semax is widely investigated for neuroprotective properties — its capacity to support neuronal health under conditions of stress, oxidative challenge, or reduced blood flow in research models. This protective dimension has made it a focus of work on brain resilience and recovery. It is one of the qualities most frequently highlighted across the Russian-language research record.
Focus & mental endurance
Semax is studied for its supportive effects on sustained attention, alertness, and mental stamina during demanding cognitive tasks. Researchers explore how it may help maintain clarity and motivation under prolonged mental load. This combination of focus and endurance reinforces its standing as a premier research peptide for cognitive performance.
Neuromodulatory balance
Mechanistic research connects Semax to the modulation of multiple neurotransmitter and signaling systems, contributing to a balanced, adaptive brain state rather than blunt overstimulation. This broad neuromodulatory footprint is thought to support its versatile cognitive and protective profile. It is a key reason Semax remains a compelling and heavily studied research compound.
Prep it right
Reconstitute gently — add bacteriostatic water down the vial wall and swirl, don't shake. The lyophilized powder goes fully into solution without foaming.
Reconstituting? Work out concentration and draw volume in the reconstitution calculator.
Store the lyophilized vial at −20 °C, protected from light. Once reconstituted, refrigerate and use it within the diluent's window.
Lyophilization (freeze-drying) removes water under low pressure so the peptide sublimates from solid to vapor, leaving a stable powder that preserves its integrity until it is reconstituted with bacteriostatic water. Lyophilized vials are robust in transit and reach their longest shelf life when stored cold and protected from light.
All products are sold for laboratory and research use only and are not for human or veterinary consumption, diagnosis, or treatment of any kind. These statements have not been evaluated by the U.S. Food and Drug Administration. The products and statements are not intended to diagnose, treat, cure, or prevent any disease. Amino Meta is a chemical supplier and is not a compounding pharmacy or an outsourcing facility as defined under sections 503A and 503B of the Federal Food, Drug, and Cosmetic Act.
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