Which vendors sell Tirzepatide with independent COA testing?

56 vendors in the Merit Verified directory have independent COA evidence on file for Tirzepatide — 478 COAs total. COA coverage and test dates are listed on the Tirzepatide page at https://meritverified.org/peptides/tirzepatide.

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

To verify Tirzepatide 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 Tirzepatide at https://meritverified.org/peptides/tirzepatide so you can compare evidence across vendors before buying.

What is the regulatory status of Tirzepatide?

Tirzepatide 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 Tirzepatide in your jurisdiction.

GLP-1 / Metabolic

Tirzepatide

Also known as: Tirzepatide (GIP/GLP-1 dual receptor agonist — Mounjaro, Zepbound)

Tirzepatide is a unimolecular dual GIP and GLP-1 receptor agonist with a half-life of approximately 5 days, enabling once-weekly subcutaneous dosing. It is FDA-approved as Mounjaro for type 2 diabetes (2022), Zepbound for chronic weight management in adults with obesity or overweight with a weight-related comorbidity (2023), and Zepbound for moderate-to-severe obstructive sleep apnea in adults with obesity (2024). It carries a BOXED WARNING for thyroid C-cell tumors and is contraindicated in patients with a personal or family history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2).

Where to buy · live market data

Who's worth your money for Tirzepatide

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

🇺🇸 Peptide Partners 99

Highest Merit Score (99) of 26 scored sellers

$1.50/mg

$1800 · 1200mg · 99.1% purity

18 COAs

Buy

Best value

🇭🇰 Hkuppeptide 48

Lowest $/mg among scored sellers

$0.50/mg

$10.00 · 20mg · 99.8% purity

1 COA

Buy

Most tested

🇺🇸 Profound Aminos 95

57 independent COAs on file

$3.95/mg

$158 · 40mg · 99.9% purity

57 COAs

Buy

Average price

$4.03/mg

range $0.50–$16.00/mg

Sellers

from $10.00

45-day trend

-2.5%

vs 45-day avg $/mg

42 of 48 sellers have a current price· 5 stale hidden· 11 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Peptide Partners via Disclosed Labs · 1h ago	$1800· 1200mg	$1.50/mg	-62.8%	99.1%	18	99	Buy
🇺🇸	Hydro Research Peptides via Disclosed Labs · 1h ago	$465· 100mg	$4.65/mg	+15.5%	100.0%	21	97	Buy Code MERIT · 15% off
🇺🇸	Prime Peptides via Disclosed Labs · 1h ago	$260· 60mg	$4.33/mg	+7.6%	99.9%	6	96	Buy
🇺🇸	Sunrise Bioresearch via Disclosed Labs · 1h ago	$359· 600mg	$0.60/mg	-85.1%	99.9%	3	95	Buy
🇺🇸	Reta One Labs via Disclosed Labs · 1h ago	$185· 100mg	$1.85/mg	-54.1%	99.6%	18	95	Buy affiliate
🇺🇸	Orbitrex Peptides via Disclosed Labs · 1h ago	$200· 60mg	$3.33/mg	-17.2%	99.7%	15	95	Buy Code Orbitrex10 · 10% off
🇺🇸	Profound Aminos via Disclosed Labs · 1h ago	$158· 40mg	$3.95/mg	-1.9%	99.9%	57	95	Buy
🇺🇸	Forge Performance Co. via Disclosed Labs · 1h ago	$100· 30mg	$3.33/mg	-17.2%	99.8%	2	94	Buy Code MERIT · 10% off
	Nova Peptides via Disclosed Labs · 1h ago	$350· 100mg	$3.50/mg	-13.1%	—	—	94	Buy
🇺🇸	Ignite Peptides via Disclosed Labs · 1h ago	$150· 30mg	$5.00/mg	+24.2%	99.6%	4	93	Buy Code MERIT · 10% off

Top Merit pick

🇺🇸 Peptide Partners
via Disclosed Labs · 1h ago
99

$1.50/mg -62.8% vs avg

$1800

1200mg

99.1% purity 18 COAs

Buy
🇺🇸 Hydro Research Peptides
via Disclosed Labs · 1h ago
97

$4.65/mg +15.5% vs avg

$465

100mg

100.0% purity 21 COAs

Buy Code MERIT · 15% off
🇺🇸 Prime Peptides
via Disclosed Labs · 1h ago
96

$4.33/mg +7.6% vs avg

$260

60mg

99.9% purity 6 COAs

Buy
🇺🇸 Sunrise Bioresearch
via Disclosed Labs · 1h ago
95

$0.60/mg -85.1% vs avg

$359

600mg

99.9% purity 3 COAs

Buy
🇺🇸 Reta One Labs
via Disclosed Labs · 1h ago
95

$1.85/mg -54.1% vs avg

$185

100mg

99.6% purity 18 COAs

Buy affiliate
🇺🇸 Orbitrex Peptides
via Disclosed Labs · 1h ago
95

$3.33/mg -17.2% vs avg

$200

60mg

99.7% purity 15 COAs

Buy Code Orbitrex10 · 10% off
🇺🇸 Profound Aminos
via Disclosed Labs · 1h ago
95

$3.95/mg -1.9% vs avg

$158

40mg

99.9% purity 57 COAs

Buy
🇺🇸 Forge Performance Co.
via Disclosed Labs · 1h ago
94

$3.33/mg -17.2% vs avg

$100

30mg

99.8% purity 2 COAs

Buy Code MERIT · 10% off
Nova Peptides
via Disclosed Labs · 1h ago
94

$3.50/mg -13.1% vs avg

$350

100mg

no purity

Buy
🇺🇸 Ignite Peptides
via Disclosed Labs · 1h ago
93

$5.00/mg +24.2% vs avg

$150

30mg

99.6% purity 4 COAs

Buy Code MERIT · 10% off

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.

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Compound reference

About Tirzepatide

CAS

2023788-19-2

Molecular formula

C225H348N48O68

Sequence

YXEGTFTSDYSIXLDKIAQKAFVQWLIAGGPSSGAPPPSamide

Typical dose range

2.5–15 mg once weekly subcutaneous injection (research studies mirror clinical titration: start 2.5 mg/week, escalate by 2.5 mg every 4 weeks to max 15 mg/week)

Half-life

~5 days (~120 hours)

Independent evidence

COAs for Tirzepatide

478 third-party tests across 56 vendors. Each card links to the full report.

All 478 COAs for Tirzepatide →

Measured purity over time

For

Tirzeppatide

by Reta One Labs· batch TZ201026

Tirzepatide

Who's worth your money for Tirzepatide

Watch Tirzepatide

About Tirzepatide

COAs for Tirzepatide

23 citations indexed for Tirzepatide

Weight-Loss Outcomes After Sleeve Gastrectomy Versus Tirzepatide in a Minority Cohort With Severe Obesity: Results From a Propensity Score Matched Cohort

Tirzepatide alleviates hepatic steatosis and inflammation in MASLD partly through suppression of macrophage Dectin-1/Syk/NF-κB signaling

Tirzepatide Initiation in Lithium-Treated Bipolar Disorder: Renal Biomarker Trajectories and Lithium Safety Signals Over 12 Months in a Real-World Cohort

Tirzepatide safety in EudraVigilance: descriptive and disproportionality analysis of preferred terms related to suboptimal treatment outcomes and drug-use-related issues

Tirzepatide use in adolescents with metabolic dysfunction‐associated steatotic liver disease (MASLD): A case series

Comparative Efficacy of Tirzepatide Versus Semaglutide for Weight Loss in Adults With Overweight or Obesity: A Systematic Review and Meta-Analysis of Head-to-Head Studies