Skip to main content

Best Dihexa Telehealth Providers for Cognitive health and brain function

A small molecule peptidomimetic derived from angiotensin IV that potently activates the HGF/Met signaling system. Animal studies show cognitive enhancement orders of magnitude more potent than BDNF. Studied for Alzheimer's disease and cognitive decline.

Sarah Chen
Sarah ChenLead Health Editor
Dr. James Okafor, PharmDReviewed by Dr. James Okafor, PharmDPharmD
Updated January 15, 2025
Fact CheckedClinically Reviewed
Updated January 2025 — may be outdated
CognitiveOral or transdermalPrescription Required

What is Dihexa Used For?

  • Cognitive enhancement
  • Memory improvement
  • Neuroprotection
  • Alzheimer's research

How Dihexa Works

Dihexa (PNB-0408) is a small peptidomimetic derived from angiotensin IV that activates the HGF/Met (hepatocyte growth factor/c-Met receptor) signaling pathway in the brain. HGF/Met signaling promotes synaptogenesis — the formation of new synaptic connections between neurons — which is critical for memory consolidation and cognitive function. Animal studies demonstrate cognitive enhancement orders of magnitude more potent than BDNF itself. Dihexa crosses the blood-brain barrier efficiently via oral and transdermal routes.

What to Expect

Cognitive effects are typically reported within 1–3 days of use — improved memory recall, enhanced verbal fluency, and increased mental clarity. Effects may be dose-dependent and cumulative with regular use over 2–4 weeks. Because it promotes synaptic plasticity, cognitive gains may persist beyond the active dosing period. Individual variation is significant.

Common Side Effects

  • Overstimulation or anxiety at high doses
  • Headache
  • Irritability or agitation
  • Insomnia if taken late in the day
  • Long-term safety profile not established in humans

This is not a complete list of side effects. Always consult your prescribing physician before starting Dihexa.

Frequently Asked Questions About Dihexa

How potent is Dihexa compared to other nootropics?

Dihexa is described in its original research (Joseph et al., WSU) as being 10 million times more potent than BDNF in promoting synaptogenesis in animal models. In terms of practical cognitive enhancement, users report it as among the most noticeable single-compound nootropics — more so than racetams, modafinil, or most peptide nootropics.

Can Dihexa be taken orally?

Yes — unlike most peptides, Dihexa is a peptidomimetic (a non-peptide compound that mimics a peptide's activity) with favorable oral bioavailability and ability to cross the blood-brain barrier. It is also used transdermally. Oral dosing is typically 5–35mg per week (not daily — due to long duration of action and potency).

Is Dihexa being developed for Alzheimer's disease?

Dihexa was originally developed at Washington State University with Alzheimer's disease in mind — HGF/Met signaling loss is a feature of AD pathology. It has shown memory restoration in aged and Alzheimer's mouse models. No human clinical trials are published as of 2025, but it is of significant research interest.

What are the risks of promoting synaptogenesis?

Promoting synaptogenesis theoretically could enhance existing connections non-selectively, including those encoding fear, trauma, or maladaptive patterns. There are also theoretical concerns about excessive synaptic growth in oncological contexts. These theoretical risks have not materialized in animal studies, but long-term human safety data is absent. Caution and physician supervision are warranted.

3 Providers Offering Dihexa

Sorted by lowest price first.

ProviderPriceDoseRatingConsultationLab Testing
Amino Asylum

United States

$60/one-timeNasal or topical3.8/5Async TelehealthNot included
Defy Medical

Tampa, FL

$200/monthlyStandard protocol4.1/5Video TelehealthIncluded
TruLife Health

Scottsdale, AZ

$260/monthlyStandard protocol4.1/5Video TelehealthIncluded

Related Cognitive health and brain function Peptides

Other cognitive health and brain function peptides