Dihexa vs Selank.
Quick Verdict
Dihexa is a neurotropic peptide primarily researched for synaptogenesis, memory enhancement, cognitive repair, angiotensin iv activity, while Selank is a anxiolytic peptide studied for anxiety reduction, mental clarity, mood. Selank has substantially more indexed research (20 studies) compared to Dihexa (2 studies). A key distinction: Selank has FDA approval status.
Side-by-Side Analysis
| Dimension | Dihexa | Selank |
|---|---|---|
| Category | Neurotropic Peptide | Anxiolytic Peptide |
| Mechanism | Angiotensin IV analog developed at Washington State University. | Modulates GABA/serotonin neurotransmitter systems. |
| Half-Life | ~2 days | ~30 minutes |
| Route | Oral | Nasal |
| Typical Dose | 5–20 mcg | 300–300 mcg |
| Frequency | Infrequent (2-3x per week due to long half-life) | 7x/wk |
| Evidence Level | Preclinical | Moderate |
| Indexed Studies | 2+ indexed | 20+ indexed |
| FDA Status | Research Only | Approved |
| Lowest Price | — | $29.99 / 10mg via Amino Club |
Mechanism of Action Comparison
How Dihexa Works
Dihexa Dihexa is a brain-penetrating peptide from Washington State University research that triggers new synapse formation at extremely low doses — it's been called millions of times more potent than BDNF for this effect in rodent models.
Angiotensin IV analog developed at Washington State University. Binds hepatocyte growth factor (HGF) and potentiates its binding to the c-Met receptor, triggering downstream synaptogenesis cascades in hippocampal neurons. Reported to be 7 orders of magnitude more potent than BDNF for synaptic formation in vitro. Crosses blood-brain barrier and is orally bioavailable. Produces dose-dependent improvements in spatial memory in rodent models of cognitive impairment.
How Selank Works
Selank Selank is a synthetic anxiolytic peptide approved in Russia studied for reducing anxiety and improving mental clarity, with effects comparable to benzodiazepines but without sedation or dependence.
Modulates GABA/serotonin neurotransmitter systems. Enhances immune function by influencing IL-6 and T-helper cell balance. Stabilizes enkephalin levels.
Key Mechanistic Difference
Dihexa operates as a neurotropic peptide, while Selank functions as a anxiolytic peptide — these are fundamentally different pharmacological approaches. Dihexa has a significantly longer half-life (~2 days) compared to Selank (~30 minutes), which impacts dosing frequency and sustained activity.
Research Evidence
Dihexa
2 studies- Dihexa promotes synaptogenesis and cognitive function in rodentsMcCoy et al. (Journal of Pharmacology & Experimental Therapeutics): Dihexa produces dose-dependent improvements in spati…Preclinical
- Angiotensin IV analogs and HGF/c-Met signaling in memoryWright et al.: Establishes the mechanistic basis for angiotensin IV analog activity at HGF and c-Met, demonstrating memo…Preclinical
Selank
20 studies- Selank anxiolytic effects in humansClinical trial demonstrates Selank's anxiolytic efficacy in patients with generalized anxiety disorder, comparable to be…Moderate
- Selank anti-anxiety effects comparable to benzodiazepinesStudy confirms Selank provides significant anti-anxiety effects comparable to benzodiazepine treatment, with added cogni…Moderate
- Selank increases BDNF in hippocampus and prefrontal cortexSelank increases BDNF production in the rat hippocampus and prefrontal cortex, preventing ethanol-induced memory impairm…Preclinical
Vendor Pricing
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Frequently Asked Questions
Can I take Dihexa and Selank together?▼
Yes — Dihexa and Selank are identified as synergistic in interaction databases. They operate through complementary mechanisms and are commonly combined in research protocols.
Which has more research evidence — Dihexa or Selank?▼
Dihexa has 2 indexed studies (highest evidence: Preclinical). Selank has 20 indexed studies (highest evidence: Moderate). Selank has a more extensive research base.
Which is better for brain focus — Dihexa or Selank?▼
Both are researched for brain focus. Dihexa addresses this via synaptogenesis, memory enhancement, cognitive repair, angiotensin iv activity. Selank approaches it through anxiety reduction, mental clarity, mood. The optimal choice depends on your specific research protocol and which mechanism aligns with your objectives.
Is Dihexa or Selank FDA-approved?▼
Selank has FDA approval (or is derived from an FDA-approved compound). Dihexa is a research compound without FDA approval for human use. FDA status reflects regulatory evaluation — not necessarily superiority for all research applications.
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Research Use Only — Not Medical Advice
This comparison is provided for educational and research purposes only. It does not constitute medical, prescribing, or treatment advice. Clinical data cited here is sourced from published peer-reviewed trials and FDA labels. Consult a qualified healthcare professional before making any decisions about medications or research compounds. PeptiDex is an informational resource and does not sell pharmaceutical products.