Dihexa alternatives.

9 compounds compared to Dihexa, ranked by published evidence tier and regulatory status, not by what's marketed hardest.

Why people look for an alternative

Dihexa attracts attention through a striking preclinical premise: an angiotensin IV derivative modified for lipophilicity and metabolic stability so it can cross into the brain, investigated as a procognitive agent. What sends people looking for alternatives is the rest of the record. It is research-use-only, not approved by the FDA or any major regulator for any indication, has no DailyMed monograph, has not completed human clinical trials, and is not a dietary supplement. It is not a WADA-listed named substance, though non-approved experimental compounds are broadly disallowed in sport. No compound in this angiotensin-derived procognitive class has human trial data, so the honest alternatives are category neighbors.

What you're comparing against
Dihexa
F tier · 15/100Research / preclinical

Dihexa (N-hexanoic-Tyr-Ile-(6)-aminohexanoic amide; also referenced as PNB-0408) is a small, orally active peptidomimetic derived from angiotensin IV (Ang IV), a C-terminal fragment of the renin-angiotensin system.

Ranked by evidence · strongest first
  1. 01
    Cerebrolysin
    C tierResearch / preclinical
    porcine brain peptide preparation

    Acts through the neurotrophic factor signalling pathway, like Dihexa. Research / preclinical.

  2. 02
    Semax
    D tierResearch / preclinical

    Acts through the neurotrophic factor signalling pathway, like Dihexa. Research / preclinical.

  3. 03
    Cortexin
    D tierResearch / preclinical
    cattle brain polypeptides

    Acts through the neurotrophic factor signalling pathway, like Dihexa. Research / preclinical.

  4. 04
    N-Acetyl Semax Amidate
    F tierResearch / preclinical

    Acts through the neurotrophic factor signalling pathway, like Dihexa. Research / preclinical.

  5. 05
    P21
    F tierResearch / preclinical
    P021 · CNTF-derived peptide mimetic

    Acts through the neurotrophic factor signalling pathway, like Dihexa. Research / preclinical.

  6. 06
    Selank
    D tierResearch / preclinical

    Same category: cognition & mood. Research / preclinical.

  7. 07
    PE-22-28
    F tierResearch / preclinical
    spadin analog

    Same category: cognition & mood. Research / preclinical.

  8. 08
    DSIP
    F tierResearch / preclinical
    delta sleep-inducing peptide

    Same category: cognition & mood. Research / preclinical.

  9. 09
    Pinealon
    F tierResearch / preclinical

    Same category: cognition & mood. Research / preclinical.

How this list is built

An “alternative” here means a compound that shares Dihexa's mechanism pathway or sits in the same category, not a marketing substitute. Each is ordered by PepCue's evidence tier (a weighted 0–100 score across human data, safety, replication and regulatory clarity), then by whether it's actually approved. This is a research reference, not medical or purchasing advice: an alternative sitting higher on evidence does not mean it's right, safe, or legal for any given use. Reviewed June 1, 2026.

Comparing options with your provider?

PepCue keeps every compound, dose and lab in one private, provider-ready timeline, whichever one you land on.

Educational and research reference only. Not medical advice, diagnosis, or dosing guidance. Flag an error on this page
Compounds