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Dihexa Benefits: Claims vs What Studies Show

Benefits people claim for Dihexa, set against what published studies measured, and where no study exists.

Medical review pendingHGF/c-Met nootropicUpdated
Strongest evidence
Animal
Human / animal studies
0 / 5
in our evidence file (PubMed search, 11 Oct 2026)
FDA status
Not approved
Off Category 2, 15 Apr 2026

Claimed benefits and what studies show

Each row is an area where people claim a benefit, with the strongest study we summarise behind it. Animal and cell results are labelled and are not human results. User reports are not counted as evidence here.

Dihexa claimed benefits and the studies behind them
ClaimBest evidenceStudies (human / animal)What was measuredPage
Brain healthAnimal evidence, 2 of 40 / 3Huntington-like deficits; Spatial learning; NeuroinflammationEvidence for brain health
InflammationAnimal evidence, 2 of 40 / 1NeuroinflammationEvidence for inflammation
NeuropathyAnimal evidence, 2 of 40 / 1Limb motor recoveryEvidence for neuropathy
HealingAnimal evidence, 2 of 40 / 1Limb motor recoveryNone

Strongest study per claim: Brain health, Journal of Huntington's disease 2024, PMID 38489193; Inflammation, Brain sciences 2021, PMID 34827486; Neuropathy, Annals of medicine and surgery 2021, PMID 34703584.

What the studies measured

Dihexa outcomes in published studies
OutcomeResultStudy typeSource
Huntington-like deficitsDihexa (PNB-0408) did not protect rats from 3-NP-induced motor and cognitive deficits.Animal · rat (not a human result)n = 40Journal of Huntington's disease 2024, PMID 38489193
Spatial learningDihexa restored spatial learning and cognitive function in the Morris water maze in a transgenic Alzheimer mouse model.Animal · mouse (not a human result)Brain sciences 2021, PMID 34827486
NeuroinflammationDihexa reduced glial activation and pro-inflammatory cytokines and raised IL-10 in the mouse brain.Animal · mouse (not a human result)Brain sciences 2021, PMID 34827486
Limb motor recoveryMotor function improved at 8-16 weeks with MSC plus dihexa (and MSC plus G-CSF) given into muscle; dihexa alone was not singled out.Animal · rat (not a human result)Annals of medicine and surgery 2021, PMID 34703584
Hair cell protection1 μM dihexa gave optimal protection of hair cells against neomycin or gentamicin.Animal · zebrafish larva (not a human result)Frontiers in cellular neuroscience 2015, PMID 25674052
Antidementia activity (scopolamine and aged rats)Dihexa, an orally active blood-brain-barrier-permeant analog, showed antidementia activity in scopolamine and aged rat models and marked synaptogenic activity.Animal · rat (not a human result)The Journal of pharmacology and experimental therapeutics 2013, PMID 23055539
Not shown in any study we cite. Searches behind this page: PubMed search on 2 Oct 2026 for “dihexa[tiab] OR "N-hexanoic-Tyr-Ile-(6) aminohexanoic amide"[tiab]”: 17 results. PubMed search on 2 Oct 2026 for “"N-hexanoic-Tyr-Ile-(6) aminohexanoic amide"[tiab] OR "Nle1-angiotensin IV"[tiab] OR "angiotensin IV analog"[tiab] OR "AngIV analog"[tiab]”: 14 results. PubMed search on 2 Oct 2026 for “(dihexa[tiab] OR "hepatocyte growth factor"[tiab]) AND (mimetic[tiab] OR "angiotensin IV"[tiab] OR Nle[tiab]) AND (memory[tiab] OR cognit*[tiab])”: 7 results. PubMed search on 11 Oct 2026 for “(dihexa[tiab] OR "angiotensin IV analog"[tiab]) AND (adverse[tiab] OR "side effect*"[tiab] OR safety[tiab] OR tolerab*[tiab] OR toxicity[tiab] OR "case report"[pt])”: 2 results.

The memory and cognition claim

Claim: dihexa improves memory. The evidence is from rats and mice. In aged rats and in a scopolamine memory-deficit model, an early paper reports antidementia activity and synapse formation.[5]

In a mouse model of Alzheimer's disease (APP/PS1), dihexa restored spatial learning in the Morris water maze test. This is mouse data only.[2]

A rat study of Huntington's-like symptoms found the opposite: the compound did not protect rats from the deficits caused by the toxin.[1]

Inflammation

Claim: it reduces inflammation. In the mouse Alzheimer's model, dihexa lowered the pro-inflammatory cytokines IL-1β and TNF-α and raised IL-10.[2]

Nerve injury and hearing

Claim: it helps nerves recover after injury. In rats with a cut sciatic nerve, the abstract reports better motor function from week 8 to 16 when stem cells were combined with dihexa given into the muscle.[3]

Claim: it protects hearing. In zebrafish larvae, a dihexa concentration of 1 μM gave optimal protection of hair cells from two antibiotics. No mammal or human data are cited.[4]

Where human evidence is missing

FDA's compounding-risk notice says it has found no human exposure data on drug products containing dihexa acetate by any route, and does not know if it would cause harm.[10]

More on Dihexa

DosageResultsHow it works

Common questions

Is Dihexa proven to work?

The strongest study we summarise for Dihexa is animal evidence, among 5 studies. That is not proof it works in people.

What does dihexa do?

Published work describes it as an orally active, blood-brain-barrier permeant analogue of angiotensin IV, studied in rodents for antidementia activity.[5]

More on Dihexa

DosageDoses used in published studies, with the source for each.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.For cognitionWhat research says about Dihexa for cognition.How it worksTarget, mechanism and how long it acts, from the label or studies.

Sources

  1. 1Effects of an Angiotensin IV Analog on 3-Nitropropionic Acid-Induced Huntington's Disease-Like Symptoms in Rats.Journal of Huntington's disease · 2024PMID 38489193Accessed 2 Oct 2026
  2. 2AngIV-Analog Dihexa Rescues Cognitive Impairment and Recovers Memory in the APP/PS1 Mouse via the PI3K/AKT Signaling Pathway.Brain sciences · 2021PMID 34827486Accessed 2 Oct 2026
  3. 3Stem cell, Granulocyte-Colony Stimulating Factor and/or Dihexa to promote limb function recovery in a rat sciatic nerve damage-repair model: Experimental animal studies.Annals of medicine and surgery (2012) · 2021PMID 34703584Accessed 2 Oct 2026
  4. 4Hepatocyte growth factor mimetic protects lateral line hair cells from aminoglycoside exposure.Frontiers in cellular neuroscience · 2015PMID 25674052Accessed 2 Oct 2026
  5. 5Evaluation of metabolically stabilized angiotensin IV analogs as procognitive/antidementia agents.The Journal of pharmacology and experimental therapeutics · 2013PMID 23055539Accessed 2 Oct 2026
  6. 6PubMed search: dihexa[tiab] OR "N-hexanoic-Tyr-Ile-(6) aminohexanoic amide"[tiab] (17 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  7. 7PubMed search: "N-hexanoic-Tyr-Ile-(6) aminohexanoic amide"[tiab] OR "Nle1-angiotensin IV"[tiab] OR "angiotensin IV analog"[tiab] OR "AngIV analog"[tiab] (14 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  8. 8PubMed search: (dihexa[tiab] OR "hepatocyte growth factor"[tiab]) AND (mimetic[tiab] OR "angiotensin IV"[tiab] OR Nle[tiab]) AND (memory[tiab] OR cognit*[tiab]) (7 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  9. 9PubMed search: (dihexa[tiab] OR "angiotensin IV analog"[tiab]) AND (adverse[tiab] OR "side effect*"[tiab] OR safety[tiab] OR tolerab*[tiab] OR toxicity[tiab] OR "case report"[pt]) (2 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 11 Oct 2026
  10. 10Official web pageOfficial web page · web page

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