Dihexa
INVESTIGATIONALPotent nootropic | Synaptogenesis
Updated: August 2026.
Key points
- What it is: angiotensin IV-derived nootropic, extremely potent.
- Main use: memory, learning and formation of new synapses.
- Typical dose: 5–20 mg per day, oral or topical (small doses due to its potency).
- Key result: supports synaptogenesis through the HGF/c-Met pathway.
- Common effects: poorly characterized; possible headache or overstimulation.
- Comparison: far more potent than other nootropics, but with less safety data.
- Status: not FDA-approved (research compound).
Overview
What is Dihexa?
Dihexa is a synthetic nootropic derived from angiotensin IV, known for its exceptional potency: in preclinical models it supports synapse formation with efficacy far greater than factors such as BDNF. It is researched for possible effects on memory and learning.
Key benefits
Stimulation of synaptogenesis (creation of new neural connections), with possible benefits for memory and learning. Its potency allows very small doses. It is of interest in cognitive-decline research.
Mechanism of action
It works by enhancing the hepatocyte growth factor pathway and its receptor c-Met, involved in the formation and strengthening of synapses. That same pathway calls for caution due to its link with cell growth.
Quick start guide
Dosing protocol
| Phase | Dose | Frequency | Duration |
|---|---|---|---|
| Standard | 5–20 mg | 1 time/day | In cycles |
Due to its enormous potency, small doses are used. Safety data are limited: the regimen must be assessed by a healthcare professional.
🧮 Calculate your exact syringe dose →⚠️ Who should NOT use it
- Very limited safety data and high potency — utmost caution.
- Theoretical concern: the c-Met pathway is linked to cell growth (caution in cancer).
- Pregnancy or breastfeeding.
- Always under the supervision of a healthcare professional.
What to expect
- Week 1: possible greater clarity or focus.
- Week 1-2: some users report better working memory.
- Week 2-4: more noticeable cognitive effects.
- In cycles: breaks are advisable given the scarce data.
- Side effects: headache or overstimulation possible.
- Most effective for: memory and learning (research).
Side effects & safety
- Poorly characterized profile (research compound).
- Possible headache.
- Overstimulation or insomnia if taken late.
- Caution due to the c-Met pathway's link with cell growth.
- Use small doses given its potency.
- Allergic reaction: rash, itching or swelling.
- Severe or persistent headache.
- Any striking neurological symptom.
- Any new, suspicious lump or growth.
- If you are pregnant or planning a pregnancy.
Frequently asked questions
What is Dihexa?
It is a very potent nootropic derived from angiotensin IV that supports synapse formation.
Why is it used in small doses?
Due to its enormous potency: in models it is far more effective than factors such as BDNF.
How is Dihexa taken?
Orally or topically, around 5-20 mg per day (investigational). The regimen is set by a professional.
Is Dihexa safe?
Safety data are limited; its link with the c-Met pathway advises caution.
What are the side effects?
Poorly characterized; possible headache or overstimulation.
Is Dihexa approved?
No; it is a research compound not approved by the FDA.
Research areas
- Memory
- Learning
- Synaptogenesis
- Neuroprotection
- Cognitive decline
Related peptides
- Semax — Milder intranasal nootropic.
- Cerebrolysin — Clinical-use neurotrophic peptides.
- Selank — Intranasal anxiolytic peptide.
Related articles
Related topics
- Dihexa and memory
- Dihexa dose
- Dihexa synaptogenesis
- Dihexa nootropic
- Dihexa safety
- Dihexa side effects
Summary
What it is: Potent nootropic (angiotensin IV).
How it is researched: Oral or topical, 5-20 mg per day.
Key features: Supports synaptogenesis; limited data. Not FDA-approved.
Related peptides: Semax, Cerebrolysin and Selank.