Nootropic Research Compounds

Nootropic research compounds are reference materials studied in preclinical models of cognitive function — synaptic signalling, neurotrophic support, cerebral metabolism and oxidative stress. This category groups peptides and non-peptide small molecules most investigated across those pathways so researchers can compare mechanism, format and documentation in one place. Every item is supplied strictly as Research Use Only (RUO) material with a batch Certificate of Analysis; nothing here is intended for human or veterinary use.
Mechanisms investigated
Cognitive research spans several distinct molecular classes, and these compounds map onto different ones — they are not interchangeable:

ACTH-fragment peptides (Semax, Selank): studied for BDNF/NGF signalling and neuropeptide modulation; often compared together as heptapeptide/pentapeptide analogues.
Multi-peptide neurotrophic preparations (Cerebrolysin): investigated as a mixture of low-molecular-weight peptides derived from porcine brain protein for neurotrophic-pathway research.
Neurotrophic signalling peptides (P21 / P021): studied for BDNF-mimetic activity at the TrkB receptor.
Peptidomimetics (Dihexa): investigated as a small-molecule HGF/c-Met pathway modulator designed to cross the blood-brain barrier.
Small-molecule neuroprotective compounds (J-147, 9-Me-BC): studied for mitochondrial and neurotrophic signalling outside the peptide class.
Redox-active small molecules (Methylene Blue): investigated for mitochondrial electron-transport-chain interaction and cellular oxidative-stress models.
Sleep-regulatory peptides (DSIP): studied for delta-wave sleep induction and neuroendocrine modulation.

Comparison
CompoundClassPathway / targetResearch focusFormat
SemaxACTH-fragment peptideBDNF / NGF signallingNeurotrophic & cognitive researchVial
SelankAnxiolytic peptide (Tuftsin analogue)GABA-BDNF interplayNeuropeptide / anxiolytic-model researchVial
Semax + SelankPeptide blendCombined BDNF/NGF & GABA pathwaysComparative neuropeptide researchVial
CerebrolysinMulti-peptide preparationNeurotrophic factor signallingNeurotrophic-pathway researchVial
P21 (P021)Neurotrophic peptideTrkB receptorBDNF-mimetic signalling researchVial
DihexaPeptidomimetic (small molecule)HGF / c-Met pathwaySynaptogenesis researchCapsules
J-147Small moleculeMitochondrial / neurotrophic signallingNeuroprotective-model researchCapsules
9-Me-BCSmall molecule (beta-carboline)GDNF / dopaminergic pathwayNeurotrophic-model researchCapsules
Methylene BlueSmall molecule (phenothiazine)Mitochondrial electron transport chainOxidative-stress & metabolism researchCapsules
DSIPSleep-regulatory peptideDelta-wave / neuroendocrine axisSleep-signalling researchVial

Comparison

What is the difference between Semax and Selank?

Semax is an ACTH(4-10) heptapeptide analogue studied for BDNF/NGF signalling, while Selank is a Tuftsin analogue studied for GABAergic and anxiolytic-model pathways. Both are investigated as neuropeptides but act on distinct targets. See our Selank vs Semax comparison for a full mechanism breakdown.

Are Semax, Selank and Methylene Blue legal to purchase in Europe?

Legal status varies by compound, member state and intended use. All items in this category are supplied strictly as Research Use Only material, not for human or veterinary use. See our per-compound legal guides for Semax, Selank and Methylene Blue.

Is Dihexa a peptide?

No. Dihexa is a peptidomimetic small molecule derived from angiotensin IV research, designed to modulate the HGF/c-Met pathway while retaining oral bioavailability, unlike the peptides in this category. See our Dihexa research guide for detail.

What is the difference between J-147 and 9-Me-BC?

Both are small-molecule compounds studied outside the peptide class. J-147 is investigated for mitochondrial and neurotrophic signalling, while 9-Me-BC is a beta-carboline studied for GDNF and dopaminergic-pathway research. See our J-147 and 9-Me-BC guides, or the direct comparison article.

Do you provide a Certificate of Analysis for every compound in this category?

Yes. Every compound, whether peptide or small molecule, ships as research-use-only material with a batch-specific COA covering identity and purity by HPLC and mass spectrometry.