Cognitive & Neuro Preliminary evidence

Dihexa

N-hexanoic-Tyr-Ile-(6) aminohexanoic amide

Also known as: PNB-0408

In plain language

Dihexa is an experimental compound derived from angiotensin IV, studied in animals for its effects on memory and synapse formation. There are no published human trials, so its effects and safety in people are unknown.

What it is explored for

Dihexa is one of the most intriguing compounds in the cognitive space, with early animal work pointing to remarkably potent effects on synapse formation. That promise is exactly why researchers are curious, even though everything so far comes from the lab rather than people.

  • Focus, memory, and mental clarity
  • Learning and recall
  • Healthy synapse formation
  • Brain resilience and neuroprotection
  • Recovery of neural connections
  • Cognitive support during aging

These are areas of active interest and reported use, not proven outcomes. This peptide carries a preliminary evidence rating, see the evidence summary below for how strong the science actually is.

How it works

Dihexa was developed from angiotensin IV and is studied for effects on synaptic connections. Its proposed mechanisms come entirely from laboratory and animal work.

  • HGF/c-Met pathway. Reported to enhance signaling through hepatocyte growth factor (HGF) and its receptor c-Met in preclinical models.
  • Synaptogenesis. Associated in animal and cell studies with the formation of new synaptic connections.
  • Memory in animal models. Reported to improve performance on memory tasks in rodent models of cognitive impairment.

All of these findings are from animal and in-vitro studies. There is no human data to confirm them.

Evidence summary

The evidence for Dihexa is entirely preclinical. A small number of animal and cell studies report effects on memory and synapse formation, but there are no published, controlled human trials. Whether any of these effects occur in people is unknown.

Reported safety & side effects

There is essentially no human safety data for Dihexa. Because it promotes growth-factor signaling, theoretical concerns about effects on abnormal cell growth have been raised but not resolved. Risks in people are unknown.

Human safety dataNone; no human trials
Theoretical concernGrowth-factor signaling raises unresolved cell-growth questions
Evidence baseAnimal and in-vitro studies only

Frequently asked

Is there any human evidence for Dihexa?

No. All published research is in animals or cell models. There are no controlled human trials, so effects and safety in people are not established.

Is Dihexa approved or legal as a supplement?

No. Dihexa is not FDA-approved and is sold only as a research chemical, not as a supplement or medicine.