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№ 041

Dihexa

A brain compound aimed at building new connections between neurons. An angiotensin IV analog with strong synaptogenic effect in animal models, often-cited as 'BDNF on steroids.' Very limited human data.

Nootropic
Evidence: Anecdotal

Dihexa: A brain compound aimed at building new connections between neurons. An angiotensin IV analog with strong synaptogenic effect in animal models, often-cited as 'BDNF on steroids.' Very limited human data. Dihexa is a small peptide derived from angiotensin IV.

FDA ⓘ
Not approved
WADA
Not banned
Typical dose
8-30 mg orally or transdermally daily
Half-life ⓘ
~hours (poorly characterized in humans)
Route ⓘ
Oral or transdermal (not injected)
Schedule
Daily
In plain English

Dihexa is a small peptide derived from angiotensin IV. In animal studies it dramatically increases brain synaptogenesis, sometimes called 'BDNF on steroids'. Human data is very limited. Treat as experimental and watch the malignancy concern (synaptogenic + growth signal).

Status & legalityWhat do these mean? →
Natty? ⓘ
Not natty
FDA ⓘ
Not approved

Not FDA approved. Pre-clinical research compound.

Compounding ⓘ
Not classified

Not formally categorized in the FDA bulks lists.

WADA ⓘ
Not listed
Prescribed ⓘ

Not prescribed in conventional medicine.

Who it's for

  • →Users prioritizing cognitive function with experimental tolerance
  • →Brain-injury recovery contexts
  • →Stack with caution and short cycles

What to expect

  1. Week 1

    Subjective cognitive shifts within days for responders.

  2. Week 4

    Cycle endpoint, limited safety data on chronic use.

  3. Week 8

    Off-cycle. Reassess.

Looking at Dihexa? Your next 3 steps

  1. 1Work out your exact dose

    Vial size + BAC water turns into the exact units to draw for Dihexa.

    Open calculator →
  2. 2See what to stack & monitor

    The companion supplements and the bloodwork worth tracking on this kind of protocol.

    Bloodwork guide →
  3. 3Save it & ask the Coach

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How it works (mechanism)

Hexapeptide angiotensin IV analog. Activates the HGF/c-Met signaling pathway with reported synaptogenic effects in animal models. Limited human data on safety or efficacy.

Dosing protocol

Members only

Stacks well with

Members only

Side effects

01Limited human safety data
02Anecdotal: headache, irritability
03Theoretical: tumor-growth concern (synaptogenic + general growth signal)

When NOT to use

  • ⚠Active malignancy (theoretical concern)
  • ⚠Pregnancy / nursing
  • ⚠Anyone risk-averse to early-data peptides

Common mistakes

  • • Long cycles without safety data
  • • Stacking with multiple experimental nootropics
  • • Dismissing the theoretical malignancy concern
Free, no account needed

New to Dihexa? Grab the starter checklist.

Drop your email and we'll send the one-page first-cycle starter checklist, plus a heads-up if Dihexa changes legal status. No account needed.

No spam. No selling your email. Just the checklist and the occasional reclassification alert.

AI Coach, live sample
Members only
is 250mcg of bpc enough for a knee injury?
For a knee, 250 mcg sub-q daily is the standard working dose and a solid place to start. The trick with BPC is consistency, give it weeks, not days. Inject close to the joint, run it 4-6 weeks, and don't drop below 200 mcg, it tends to stop cracking the threshold reliably down there. If it hasn't moved at all by week 3, that's when adding TB-500 earns its place.
how much bac water for a 10mg reta vial?
3 mL is the standard play for a 10 mg reta vial. That's 3,333 mcg/mL, clean unit math across the titration: 2 mg = 60 units, 4 mg = 120 units, 6 mg = 180 units on a 100-unit insulin syringe. Run 2 mL instead if you want fewer, more concentrated shots (5,000 mcg/mL, so 2 mg = 40 units). Since most people titrate up over ~12 weeks, 3 mL keeps the numbers cleanest.
what should i track on bloodwork for tirzepatide?
Lipid panel, ALT/AST (liver enzymes), and an A1C, baseline before you start then every 3 months. If you've got metabolic-syndrome history, add fasting glucose and insulin so you can actually watch insulin sensitivity improve. You don't need a big hormone panel for a GLP-1.

Ask the Coach anything about Dihexa or your own stack. This is it working.

Trained only on Pepdex content. Does the dose math, flags interactions, knows your stack. Won't push vendors, won't pretend to be a doctor.

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Frequently asked

What is Dihexa?+
Dihexa is a small peptide derived from angiotensin IV. In animal studies it dramatically increases brain synaptogenesis, sometimes called 'BDNF on steroids'. Human data is very limited. Treat as experimental and watch the malignancy concern (synaptogenic + growth signal).
Is Dihexa FDA approved?+
Not FDA approved. Pre-clinical research compound.
Is Dihexa legal?+
Dihexa is not FDA-approved. It is sold by compounding pharmacies (with a prescription) and as "research only" by peptide vendors. Possession is generally not criminalized but distribution without authorization may be. Verify local laws.
Is Dihexa banned by WADA?+
Dihexa is not currently on the WADA prohibited list.
Are you still natty after taking Dihexa?+
No. Dihexa is a performance-enhancing peptide and would disqualify a strict natty claim.
Do doctors prescribe Dihexa?+
Not prescribed in conventional medicine.
What's the typical dose of Dihexa?+
8-30 mg orally or transdermally daily. No standardized human protocol.
What are the side effects of Dihexa?+
Common side effects include: Limited human safety data; Anecdotal: headache, irritability; Theoretical: tumor-growth concern (synaptogenic + general growth signal). Less common effects and full safety details are on the entry page.
How long until Dihexa starts working?+
Subjective cognitive shifts within days for responders.
What can you stack with Dihexa?+
Common pairings: Standalone, too experimental to compound effects. Full stacking protocol and timing on the entry page.
Where do people get Dihexa?+
Dihexa is most commonly sold by research-only peptide vendors and by compounding pharmacies (the latter requires a prescription). Pepdex is not a vendor, see /coa for how to verify a Certificate of Analysis before buying from any source, and /guides/scam-vendor-spotting for vendor red flags.

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