Dihexa vs Selank
Side-by-side comparison of Dihexa and Selank: mechanism, half-life, dose range, safety profile, and vendor pricing.
Price snapshot
Dihexa
Selank
Dihexa
Dihexa is a synthetic peptide analogue of the angiotensin IV metabolite LVV-hemorphin-7, developed at Washington State University. It is considered one of the most potent cognitive enhancers ever tested in animal models…
Lowest listed price: $79.99 across 3 listings
Full Dihexa profileSelank
Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro, 750 Da molecular weight) developed in the 1990s at the Institute of Molecular Genetics of the Russian Academy of Sciences as a synthetic analog of tuftsin…
Lowest listed price: $25.00 across 6 listings
Full Selank profileSide-by-side comparison
| Attribute | Dihexa | Selank |
|---|---|---|
| Category | Nootropics | Nootropics |
| Research Stage | Preclinical | Approved (Russia, as anxiolytic and nootropic medication) |
| Mechanism of Action | Dihexa is a small-molecule analog derived from angiotensin IV (AngIV). It retains the Tyr-Ile core of Nle1-AngIV, with an N-terminal hexanoic acid cap and a C-terminal 6-aminohexanoic amide that give it metabolic stability and blood-brain-barrier penetration.… | Primary Mechanism: Multi-System Neurochemical Modulation Selank does not have a single clean receptor-binding mechanism. Unlike benzodiazepines (GABA-A positive allosteric modulators), SSRIs (serotonin reuptake inhibition), or buspirone (5-HT1A partial… |
| Half-Life | Not characterized in humans. Dihexa was engineered for metabolic stability (resistant to plasma and enzymatic degradation) and blood-brain-barrier penetration; in preclinical work its central procognitive effects appear to outlast its plasma presence. | ~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation) |
| Typical Dose Range | 5 to 40 mg oral per day (anecdotal range; no established human dose) | 250-750 mcg intranasal daily (0.15% solution: 2-3 drops per nostril 2-3x daily); typical course is 14-21 days |
| Dosing Frequency | Once daily (oral), typically in the morning | Intranasal 1–3 times daily |
| Administration | Oral, Intranasal, Subcutaneous | Intranasal |
| Side Effects | No controlled human safety data. Anecdotal user reports include headache, fatigue, irritability or anxiety, insomnia, and vivid dreams, usually at higher doses. The most serious concern is theoretical rather than reported: because dihexa acts on the HGF/c-Met… | Overall Safety Profile Selank has one of the best safety profiles in the anxiolytic space. Over 15+ years of Russian clinical use and research, the compound has been associated with essentially no serious adverse events at therapeutic doses. This compares… |
| Molecular Weight | 504.7 g/mol | 751.9 Da |
| Common Vial Sizes | 50mg, 100mg | 5mg, 10mg |
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Dihexa: potential benefits
- Synaptogenesis: formation of new dendritic spines and functional synapses (preclinical)
- Memory and spatial-learning support in rodent models
- Potential research application in Alzheimer's and other neurodegenerative disease models
- HGF/c-Met and PI3K/Akt-linked neuroplasticity (mechanism proposed; key paper retracted)
Selank: potential benefits
- Anxiolytic effects comparable to benzodiazepines but without sedation or dependence in Russian clinical trials (PMID: 18454096)
- Positive allosteric modulation of brain GABA receptors through a non-benzodiazepine binding site (PMID: 30255741)
- Immunomodulation via Th1/Th2 cytokine balance and IL-6 regulation in patients with anxiety-asthenic disorders (PMID: 18577961)
- Cognitive and memory support linked to BDNF upregulation in the hippocampus in preclinical models (PMID: 18841804)
- Modulation of the endogenous enkephalin-opioid system supporting mood and stress tolerance (PMID: 22550852)
- Anti-inflammatory and adaptogenic effects through normalization of stress-induced cytokine dysregulation
- Non-addictive anxiolytic profile - no tolerance, withdrawal, or dependence reported across years of Russian clinical use
Frequently asked
What's the difference between Dihexa and Selank?
Dihexa is a nootropics that dihexa is a small-molecule analog derived from angiotensin iv (angiv). it retains the tyr-ile core of nle1-angiv, with an n-terminal hexanoic acid cap and a c-terminal…. Selank is a nootropics that primary mechanism: multi-system neurochemical modulation selank does not have a single clean receptor-binding mechanism. unlike benzodiazepines (gaba-a positive allosteric…. The two differ in mechanism, half-life (Not characterized in humans. Dihexa was engineered for metabolic stability (resistant to plasma and enzymatic degradation) and blood-brain-barrier penetration; in preclinical work its central procognitive effects appear to outlast its plasma presence. vs ~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation)), and typical dose range.
Which has the longer half-life, Dihexa or Selank?
Dihexa has a half-life of Not characterized in humans. Dihexa was engineered for metabolic stability (resistant to plasma and enzymatic degradation) and blood-brain-barrier penetration; in preclinical work its central procognitive effects appear to outlast its plasma presence.. Selank has a half-life of ~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation). Longer half-lives generally mean less frequent dosing but slower on/off kinetics.
Which is cheaper, Dihexa or Selank?
Lowest listed price on BodyHackGuide: Dihexa from $79.99, Selank from $25.00. Prices are pulled from the vendor listings tracked on BHG and change frequently. See the compare tables on each compound page for the current set of offers.
Can you stack Dihexa and Selank?
Stacking depends on mechanism overlap, safety profile, and goals. Dihexa and Selank should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds.
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