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Overview
What is Dihexa?
Dihexa is a synthetic oligopeptide derived from angiotensin IV that potently enhances cognitive function by promoting synaptogenesis. Originally developed at Washington State University for Alzheimer's disease, it's 7 orders of magnitude more potent than BDNF at stimulating new synaptic connections and uniquely crosses the blood-brain barrier.
Key Benefits
Dramatic synaptogenesis promotion, cognitive enhancement, memory improvement, neuroprotection, potential neuroregeneration. May help with Alzheimer's, TBI, and age-related cognitive decline.
Mechanism of Action
Dihexa binds to hepatocyte growth factor (HGF) with high affinity and potentiates its activity at c-Met receptor, activating PI3K/AKT pathways. This promotes formation of new synaptic connections at levels 10 million times more potent than BDNF. Crosses blood-brain barrier effectively via oral or injectable routes.
Molecular Information
Weight
504.7 Da
Length
Modified tripeptide with hexanoic acid
Type
Oligopeptide
Amino Acid Sequence:
Hexanoyl-Tyr-Ile-Ahx-NH2 (N-hexanoic-Tyr-Ile-(6)-aminohexanoic amide)
* N-terminal hexanoic acid modification for BBB penetration and metabolic stability
Pharmacokinetics
Research Indications
Memory Enhancement
Significant improvements in spatial memory, working memory, and memory consolidation demonstrated across multiple animal models.
Learning Acceleration
Enhanced acquisition of new information and skills through increased synaptic plasticity and neurogenesis.
Cognitive Recovery
Restoration of cognitive function in models of impairment, including scopolamine-induced amnesia and age-related decline.
Research Protocols
Disclaimer
These are commonly discussed research protocols and not medical advice. Consult a healthcare provider before use.
Peptide Interactions
How to Reconstitute
Important
Dihexa does NOT dissolve in water. You must use DMSO (a pharmaceutical-grade solvent) first — see steps below. Do not use bacteriostatic water alone.
Dihexa does not dissolve in water or ethanol — you must use DMSO as the solvent
For a 10mg vial: add 100 µL (0.1 mL) of pharmaceutical-grade DMSO to dissolve the powder completely
Add 400 µL (0.4 mL) PEG300 and gently swirl until the solution is clear
Add 50 µL (0.05 mL) Tween 80 and gently swirl until clear
Add 450 µL (0.45 mL) sterile saline and gently swirl until clear — this gives you 1 mL total at 10 mg/mL
The final ratio is 10% DMSO / 40% PEG300 / 5% Tween 80 / 45% saline — always add solvents in this order and make sure the solution is clear before adding the next one
Store at 2-8°C, protected from moisture. Use within 30 days. Avoid repeated freeze-thaw cycles.
For oral: No reconstitution needed — use capsules as provided
Quality Indicators
Pharmaceutical Grade
Product from licensed compounding pharmacy with certificate of analysis showing >98% purity.
Proper Storage Conditions
Shipped and stored according to specifications — room temperature for oral, 2-8°C for DMSO stock solutions.
Research Chemical Sources
If sourced as research chemical, ensure third-party testing and proper documentation.
No Testing Documentation
Avoid products without analytical testing, purity reports, or from unverified sources.
Suspicious Pricing
Extremely cheap Dihexa likely indicates poor quality or fraudulent product.
What to Expect
- Week 1-2: Subtle cognitive changes, possible headaches
- Week 2-4: Improved focus and memory formation
- Week 4-8: Peak cognitive benefits, enhanced learning
- Post-cycle: Effects may persist for days to weeks
- Common effects: Mental clarity, faster learning
- Side effects: Headaches (most common), anxiety, sleep disruption if taken late
Side Effects & Safety
- Not FDA approved - research compound only
- Theoretical cancer risk via c-Met activation
- No long-term human safety data available
- Avoid if history of cancer
- Not for pregnant/nursing women
- May cause overstimulation or anxiety
- Requires cycling to prevent tolerance
References
APP/PS1 Alzheimer's Mouse Model Study (2021)
Dihexa restored spatial learning and memory in Morris water maze tests, increased neuronal cells and synaptophysin expression, reduced neuroinflammation, and decreased glial activation in Alzheimer's model mice.
View Study (opens in new tab) →Synaptogenic Potency Comparison (2014)
Demonstrated Dihexa's remarkable potency, showing it to be 10 million times more effective than BDNF at promoting synapse formation through HGF/c-Met receptor activation.
View Study (opens in new tab) →Injectable Route Efficacy Study (2013)
Intraperitoneal injection at 0.5 mg/kg/day completely reversed scopolamine-induced cognitive deficits (p<0.001), with performance indistinguishable from healthy controls. Lower doses (0.15 mg/kg) showed partial benefits. Also tested IV and ICV routes successfully.
View Study (opens in new tab) →Quick Start Guide
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Community Insights
Self-reported by PepPedia users. Not clinical evidence. Health changes reflect all users, including those taking multiple compounds.
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