Which vendors sell Dihexa with independent COA testing?

5 vendors in the Merit Verified directory have independent COA evidence on file for Dihexa — 10 COAs total. COA coverage and test dates are listed on the Dihexa page at https://meritverified.org/peptides/dihexa.

How do I verify the quality of Dihexa from a vendor?

To verify Dihexa quality, look for an independent certificate of analysis (COA) from a third-party lab — not a lab the vendor owns or pays directly. The COA should state the tested compound, lot number, purity percentage (identity and concentration), and the lab's name. Cross-reference the lot number against the vendor's current stock. Merit Verified indexes COAs for Dihexa at https://meritverified.org/peptides/dihexa so you can compare evidence across vendors before buying.

What is the regulatory status of Dihexa?

Dihexa is tracked in the Merit Verified registry. Regulatory status for research peptides in the US has been evolving — the FDA has reclassified a number of peptides out of the 503A compounding ingredient list since 2025. Merit Verified does not provide legal or regulatory advice; check official FDA sources or consult a licensed professional for the current status of Dihexa in your jurisdiction.

Nootropic / Cognitive

Dihexa

Also known as: PNB-0408

Dihexa (PNB-0408) is a small-molecule hexapeptide-like analog of angiotensin IV developed at Washington State University by the Harding/Wright group as a preclinical candidate for Alzheimer's disease and cognitive decline. It is NOT FDA-approved and has never been tested in human clinical trials. The often-quoted claim that it is 'roughly ten million times more potent than BDNF' refers to EC50 comparisons in an in vitro dendritic spine assay, not clinical efficacy.

Where to buy · live market data

Who's worth your money for Dihexa

Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.

Top Merit pick

🇺🇸 Moglabs 96

Highest Merit Score (96) of 4 scored sellers

$0.27/mg

$40.00 · 150mg · 99.6% purity

2 COAs

Buy

Best value

🇺🇸 Peptidology 89

Lowest $/mg among scored sellers

$7.00/mg

$69.99 · 10mg

no COAs yet

Buy

Most tested

🇺🇸 Licensed Peptides 95

2 independent COAs on file

$13.00/mg

$130 · 10mg

2 COAs

Buy code MERIT · 5% off

Average price

$10.44/mg

range $0.27–$22.50/mg

Sellers

from $38.00

45-day trend

-13.5%

vs 45-day avg $/mg

11 of 21 sellers have a current price· 3 stale hidden· 4 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Moglabs via Disclosed Labs · 23h ago	$40.00· 150mg	$0.27/mg	-97.4%	99.6%	2	96	Buy
🇺🇸	Licensed Peptides ✓ verified at source · 6d ago · stale	$130· 10mg	$13.00/mg	+24.5%	—	2	95	Buy code MERIT · 5% off
🇺🇸	Peptidology ✓ verified at source · 23h ago	$69.99· 10mg	$7.00/mg	-33%	—	—	89	Buy
	Nextech Labs ✓ verified at source · 23h ago	$90.00· 4mg	$22.50/mg	+115.4%	—	—	24	Buy

Top Merit pick

🇺🇸 Moglabs
via Disclosed Labs · 23h ago
96

$0.27/mg -97.4% vs avg

$40.00

150mg

99.6% purity 2 COAs

Buy
🇺🇸 Licensed Peptides
✓ verified at source · 6d ago · stale
95

$13.00/mg +24.5% vs avg

$130

10mg

no purity 2 COAs

Buy code MERIT · 5% off
🇺🇸 Peptidology
✓ verified at source · 23h ago
89

$7.00/mg -33% vs avg

$69.99

10mg

no purity

Buy
Nextech Labs
✓ verified at source · 23h ago
24

$22.50/mg +115.4% vs avg

$90.00

4mg

no purity

Buy

Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.

Watch Dihexa

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Compound reference

About Dihexa

CAS

1401708-83-5

Molecular formula

C27H44N4O5

Typical dose range

2-5 mg/day subcutaneous or 10-40 mg/day oral/intranasal; typical research cycles 4-6 weeks on with 2-4 weeks off

Half-life

12.68 days (i.v., rat); 8.83 days (i.p., rat); ~2-4 hours estimated for oral/intranasal routes

Independent evidence

COAs for Dihexa

10 third-party tests across 5 vendors. Each card links to the full report.

All 10 COAs for Dihexa →

Measured purity over time

Aggregated · 3rd-party listing

99.46 %

Mar 2026

Chromate Moderate

For

Dihexa

by Moglabs· batch DIH001

For

Dihexa

by Moglabs· batch DIH001

For

Dihexa

by Ruo Bio· batch DIH001

COA on file

Aggregated · 3rd-party listing

99.90 %

Apr 2025

BioRegen Moderate · HPLC

For

Dihexa

by BioLongevity Labs· batch cmojb7lwg01cqkirxjd6royw0

Aggregated · 3rd-party listing

97.83 %

MZ Biolabs Moderate

For

Dihexa

by Kimera Chems· batch KC-DHX-02

Aggregated · 3rd-party listing

—

May 2026

Purity not on file

Ethos Analytics Strong

For

Dihexa

by Licensed Peptides· batch 26126001

✓ Vendor-published

—

May 2026

Purity not on file

Ethos Analytics Strong

For

Dihexa

by Licensed Peptides· batch 26126001

COA on file

Aggregated · 3rd-party listing

—

Mar 2025

Purity not on file

Janoshik Analytical Limited

For

Dihexa

by Skye Peptides· batch 01DXA25

✓ Vendor-published

—

Purity not on file

Lab unknown

For

DIHEXA

by Moglabs

Purity not on file

For

Dihexa

by Ruo Bio

COA on file

Research depth

12 citations indexed for Dihexa

All research on Dihexa →

review · 2026

Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions

Therapeutic peptides are emerging as promising adjuncts in the management of orthopaedic injuries, grounded in their ability to modulate molecular signaling networks central to cellular medicine.

animal · 2026

Umbilical cord mesenchymal stromal cells-derived HGF inhibits STING-mediated pyroptosis to alleviate cerebral ischemia/reperfusion injury via c-Met/β-catenin/RNF5 pathway

BACKGROUND: Pyroptosis plays an essential role in the pathological process of cerebral ischemia/reperfusion (I/R) injury. Hepatocyte growth factor (HGF)-modified stem cells improve brain I/R damage.

in-vitro · 2025

Comparative analysis of small molecule and growth factor-derived human induced pluripotent stem cell-derived hepatocyte-like cells

The growth factor and small molecule protocol are the two primary approaches for generating human induced pluripotent stem cell-derived hepatocyte-like cells (iPSC-HLCs). We compared the efficacy of the growth factor and small molecule protocols across fifteen different human iPSC lines.

animal · 2025

Generation and applications of an expandable and mature hiPSC-derived liver organoid

Organoids have emerged as a powerful tool for modeling liver diseases, drug screening, and personalized treatments. However, they have a limited capacity to generate functional hepatocytes in a reproducible and efficient manner.

Study · 2025

The Occurrence of Illicit Smart Drugs or Nootropics in Europe and Australia and Their Associated Dangers: Results from a Market Surveillance Study by 12 Official Medicines Control Laboratories

In recent years, an increasing number of case reports have mentioned the presence of illicit nootropics, smart drugs or mind doping products on the market.

animal · 2024

Effects of an Angiotensin IV Analog on 3-Nitropropionic Acid-Induced Huntington's Disease-Like Symptoms in Rats

Background Huntington's disease (HD) is a neurodegenerative disorder characterized by motor, cognitive, and psychiatric dysfunction caused by a mutant huntingtin protein.