What is Semax?
Semax is a synthetic peptide commonly described as Met-Glu-His-Phe-Pro-Gly-Pro and related to the ACTH(4-10) fragment. The classification does not establish a clinical effect.
Semax Reconstitution Calculator: mg, mL & Units
Classification: Synthetic regulatory heptapeptide and ACTH(4-10) analogue
Overview
Semax is a synthetic peptide commonly described in the literature as Met-Glu-His-Phe-Pro-Gly-Pro, a heptapeptide corresponding to the ACTH(4-10) fragment. The sequence and analogue description are useful for identification, but they do not make Semax interchangeable with full ACTH or with another peptide carrying a similar research label.
The available authoritative records used here are research publications. They include experimental work examining molecular interactions, gene expression, and animal models. Such studies can illuminate a biological question without establishing a clinical effect in people. PepLedger therefore uses cautious language and does not claim cognitive, anxiety, neurological, analgesic, or other benefits.
Regulatory status needs especially careful wording for Semax. A PubMed record is a publication index and not an approval decision. Because national rules can differ, this page identifies Semax as research-stage in its evidence frame and directs product-specific questions to the relevant regulator rather than inferring a global legal status.
The calculator itself does not depend on the biological claims. A visitor enters a mass printed on a container, the liquid volume associated with that entry, an amount to calculate, and a syringe scale. PepLedger performs the requested dimensional arithmetic only. It does not choose an amount, infer a route, or turn an experimental paper into a use plan.
Concentration is not an intrinsic property of a syringe marking. It is calculated from the entered mass and liquid volume. When the visitor changes the liquid-volume value, the mass-to-volume relationship changes, and so does the calculated mL representation. U-100 and U-40 are display-scale definitions. Neither one identifies Semax mass without concentration.
Experimental findings may be preliminary, model-dependent, or difficult to translate across species and formulations. A publication can support identity or a research observation while leaving clinical, quality, and regulatory questions unanswered.
Research context
Peer-reviewed records describe Semax in membrane-model research, ischemic-brain animal models, and gene-expression studies. These are distinct experimental settings. Their findings do not establish a personal cognitive, anxiety, or neurological outcome and are not used as calculator inputs.
Evidence and regulatory status
The cited PubMed records support the sequence relationship and the existence of experimental research. None of these sources is an FDA approval label for Semax.
Unit notes
Mass entries may use mg or mcg. The universal relationship is 1 mg = 1,000 mcg.
U-100 means 100 units per mL and U-40 means 40 units per mL. These are measurement-scale definitions only.
Syringe units describe volume and require the visitor-entered concentration before a mass representation can be calculated.
Limitations
- Arithmetic cannot assess a research material’s identity, purity, sterility, assay, stability, or suitability. It cannot translate an animal or laboratory finding into a human decision.
Frequently asked questions
What does the Semax calculator calculate?
It calculates concentration, a volume in mL, and a display-scale position from values manually entered by the visitor.
Does PepLedger select a Semax amount?
No. PepLedger does not determine or recommend an amount. It performs arithmetic using values entered by the visitor.
Does a PubMed paper prove Semax is approved?
No. PubMed indexes research publications. A publication is not an approval decision, product label, or proof of suitability.
Why does regulatory status differ by country?
Medicines and research substances are governed by jurisdiction-specific authorities. This page therefore avoids converting research records into a worldwide approval claim.
Why is concentration needed for syringe units?
Syringe units express a volume-scale position. The entered concentration is required to relate that volume to a Semax mass.
Sources and official references
- Semax, a Synthetic Regulatory Peptide, Affects Copper-Induced Abeta Aggregation and Amyloid Formation in Artificial Membrane Models — PubMed / ACS Chemical Neuroscience (2022)
- Semax, an analogue of adrenocorticotropin (4-10), binds specifically and increases levels of brain-derived neurotrophic factor protein in rat basal forebrain — PubMed / Brain Research (2006)
- The peptide semax affects the expression of genes related to the immune and vascular systems in rat brain focal ischemia — PubMed / BMC Genomics (2014)
Calculation methodology
PepLedger calculates concentration, liquid volume and syringe-scale position exclusively from the values you enter. It does not choose or recommend an amount.
View our calculation methodology and editorial standards
Last updated: September 13, 2026