Semax/Selank Blend vs Dihexa
Side-by-side comparison of Semax/Selank Blend and Dihexa: mechanism, half-life, dose range, safety profile, and vendor pricing.
Price snapshot
Semax/Selank Blend
Dihexa
Semax/Selank Blend
Combined nootropic and anxiolytic peptide blend
Lowest listed price: $74.99 across 3 listings
Full Semax/Selank Blend profileDihexa
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 profileSide-by-side comparison
| Attribute | Semax/Selank Blend | Dihexa |
|---|---|---|
| Category | Nootropics | Nootropics |
| Research Stage | Preclinical (no trials on the blend; components studied separately, mostly in Russia) | Preclinical |
| Mechanism of Action | The Semax/Selank blend combines two synthetic Russian-developed regulatory heptapeptides, dosed together (usually intranasally) to pair an activating, pro-cognitive peptide with a calming, anxiolytic one. Because the blend itself has never been studied, its… | 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.… |
| Half-Life | Both component peptides have short plasma half-lives (on the order of minutes) but a prolonged duration of central action, attributed to the protective C-terminal Pro-Gly-Pro sequence they share. Blend-specific pharmacokinetics have not been characterized. | 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. |
| Typical Dose Range | Semax ~250-600 mcg + Selank ~250-300 mcg per day, intranasal (community-reported; no established blend dose) | 5 to 40 mg oral per day (anecdotal range; no established human dose) |
| Dosing Frequency | Once or twice daily, intranasal (community practice; no validated schedule for the blend) | Once daily (oral), typically in the morning |
| Administration | — | Oral, Intranasal, Subcutaneous |
| Side Effects | Reported side effects are drawn from single-component use, since the blend itself has not been studied. Intranasal administration can cause nasal or throat irritation and mild headache. The Semax component may, at higher doses, cause over-stimulation,… | 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… |
| Molecular Weight | — | 504.7 g/mol |
| Common Vial Sizes | — | 50mg, 100mg |
Price History
2 data points- Half Nattys
- Disguised Alpha
Price tracking
Semax/Selank Blend: potential benefits
- Focus, clarity, and verbal fluency attributed to the Semax component (linked to BDNF/TrkB neurotrophic signaling in preclinical studies)
- Calming, anti-anxiety effects attributed to the Selank component (a GABA-modulating, anxiolytic peptide in animal and limited clinical studies)
- 'Calm focus' - the community rationale of pairing an activating peptide with an anxiolytic one to get drive without jitters
- Anecdotal stress resilience and mood support
- Reported memory and learning support (component-level preclinical signals only; not demonstrated for the blend)
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)
Frequently asked
What's the difference between Semax/Selank Blend and Dihexa?
Semax/Selank Blend is a nootropics that the semax/selank blend combines two synthetic russian-developed regulatory heptapeptides, dosed together (usually intranasally) to pair an activating, pro-cognitive peptide with a…. 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…. The two differ in mechanism, half-life (Both component peptides have short plasma half-lives (on the order of minutes) but a prolonged duration of central action, attributed to the protective C-terminal Pro-Gly-Pro sequence they share. Blend-specific pharmacokinetics have not been characterized. vs 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.), and typical dose range.
Which has the longer half-life, Semax/Selank Blend or Dihexa?
Semax/Selank Blend has a half-life of Both component peptides have short plasma half-lives (on the order of minutes) but a prolonged duration of central action, attributed to the protective C-terminal Pro-Gly-Pro sequence they share. Blend-specific pharmacokinetics have not been characterized.. 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.. Longer half-lives generally mean less frequent dosing but slower on/off kinetics.
Which is cheaper, Semax/Selank Blend or Dihexa?
Lowest listed price on BodyHackGuide: Semax/Selank Blend from $74.99, Dihexa from $79.99. 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 Semax/Selank Blend and Dihexa?
Stacking depends on mechanism overlap, safety profile, and goals. Semax/Selank Blend and Dihexa 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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