Which vendors sell Retatrutide with independent COA testing?

46 vendors in the Merit Verified directory have independent COA evidence on file for Retatrutide — 442 COAs total. COA coverage and test dates are listed on the Retatrutide page at https://meritverified.org/peptides/retatrutide.

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

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

What is the regulatory status of Retatrutide?

Retatrutide 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 Retatrutide in your jurisdiction.

GLP-1 / Metabolic

Retatrutide

Also known as: Retatrutide (LY3437943 — GLP-1/GIP/Glucagon triple agonist)

Retatrutide (Eli Lilly code LY3437943) is an investigational triple-receptor agonist simultaneously targeting GLP-1, GIP, and glucagon receptors. It is research-only and NOT FDA-approved as of April 2026; the Phase 3 TRIUMPH program is ongoing with anticipated NDA filing in 2026. Published Phase 2 data showed roughly 24% mean body weight loss at 48 weeks on 12 mg weekly (Jastreboff, NEJM 2023).

Where to buy · live market data

Who's worth your money for Retatrutide

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

🇺🇸 Reta One Labs 95

Highest Merit Score (95) of 16 scored sellers

$3.98/mg

$239 · 60mg · 99.8% purity

58 COAs

Buy affiliate

Best value

🇭🇰 Hkuppeptide 50

Lowest $/mg among scored sellers

$1.00/mg

$10.00 · 10mg · 99.8% purity

1 COA

Buy

Most tested

🇺🇸 Profound Aminos 95

31 independent COAs on file

$4.93/mg

$296 · 60mg · 99.8% purity

31 COAs

Buy

Average price

$7.83/mg

range $1.00–$36.00/mg

Sellers

from $10.00

45-day trend

+5.1%

vs 45-day avg $/mg

71 of 82 sellers have a current price· 44 stale hidden· 11 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Reta One Labs via Disclosed Labs · 23h ago	$239· 60mg	$3.98/mg	-49.1%	99.8%	58	95	Buy affiliate
🇺🇸	Profound Aminos via Disclosed Labs · 23h ago	$296· 60mg	$4.93/mg	-37%	99.8%	31	95	Buy
🇺🇸	Orbitrex Peptides via Disclosed Labs · 23h ago	$200· 36mg	$5.56/mg	-29%	99.8%	20	95	Buy code Orbitrex10 · 10% off
🇺🇸	Prime Peptides via Disclosed Labs · 23h ago	$450· 60mg	$7.50/mg	-4.2%	99.5%	7	95	Buy
🇺🇸	Licensed Peptides ✓ verified at source · 23h ago	$2021· 60mg	$33.68/mg	+330.4%	99.7%	1	95	Buy code MERIT · 5% off
🇺🇸	Forge Performance Co. ✓ verified at source · 23h ago	$160· 10mg	$16.00/mg	+104.5%	99.7%	6	94	Buy code MERIT · 10% off
🇺🇸	Riptide Wellness via Disclosed Labs · 23h ago	$290· 50mg	$5.80/mg	-25.9%	—	—	92	Buy
🇺🇸	Sunrise Bioresearch via Disclosed Labs · 23h ago	$399· 200mg	$2.00/mg	-74.5%	99.9%	12	88	Buy
🇺🇸	Simple Peptide via Disclosed Labs · 23h ago	$359· 48mg	$7.48/mg	-4.4%	99.8%	22	85	Buy
	Peptide Supply Co. via Disclosed Labs · 23h ago	$800· 600mg	$1.33/mg	-83%	99.6%	4	83	Buy

Top Merit pick

🇺🇸 Reta One Labs
via Disclosed Labs · 23h ago
95

$3.98/mg -49.1% vs avg

$239

60mg

99.8% purity 58 COAs

Buy affiliate
🇺🇸 Profound Aminos
via Disclosed Labs · 23h ago
95

$4.93/mg -37% vs avg

$296

60mg

99.8% purity 31 COAs

Buy
🇺🇸 Orbitrex Peptides
via Disclosed Labs · 23h ago
95

$5.56/mg -29% vs avg

$200

36mg

99.8% purity 20 COAs

Buy code Orbitrex10 · 10% off
🇺🇸 Prime Peptides
via Disclosed Labs · 23h ago
95

$7.50/mg -4.2% vs avg

$450

60mg

99.5% purity 7 COAs

Buy
🇺🇸 Licensed Peptides
✓ verified at source · 23h ago
95

$33.68/mg +330.4% vs avg

$2021

60mg

99.7% purity 1 COA

Buy code MERIT · 5% off
🇺🇸 Forge Performance Co.
✓ verified at source · 23h ago
94

$16.00/mg +104.5% vs avg

$160

10mg

99.7% purity 6 COAs

Buy code MERIT · 10% off
🇺🇸 Riptide Wellness
via Disclosed Labs · 23h ago
92

$5.80/mg -25.9% vs avg

$290

50mg

no purity

Buy
🇺🇸 Sunrise Bioresearch
via Disclosed Labs · 23h ago
88

$2.00/mg -74.5% vs avg

$399

200mg

99.9% purity 12 COAs

Buy
🇺🇸 Simple Peptide
via Disclosed Labs · 23h ago
85

$7.48/mg -4.4% vs avg

$359

48mg

99.8% purity 22 COAs

Buy
Peptide Supply Co.
via Disclosed Labs · 23h ago
83

$1.33/mg -83% vs avg

$800

600mg

99.6% purity 4 COAs

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.

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Compound reference

About Retatrutide

CAS

2381089-83-2

Molecular formula

C221H342N46O68

Sequence

YXQGTFTSDYSIXLDKKAQXAFIEYLLEGGPSSGAPPPS

Typical dose range

0.5–12 mg once weekly subcutaneous (Phase 2 titration; 2–8 mg most studied maintenance range)

Half-life

~6 days

Independent evidence

COAs for Retatrutide

442 third-party tests across 46 vendors. Each card links to the full report.

All 442 COAs for Retatrutide →

Measured purity over time

Retatrutide

Who's worth your money for Retatrutide

Watch Retatrutide

About Retatrutide

COAs for Retatrutide

23 citations indexed for Retatrutide

Effects of retatrutide on learning and memory in streptozotocin-induced male diabetic rats

Effect of Retatrutide, a Novel Triple Receptor Agonist, on Blood Pressure and Lipid Levels: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Efficacy and safety of retatrutide, a GIP, GLP-1, and glucagon receptor agonist, in people with type 2 diabetes and inadequate glycaemic control with diet and exercise (TRANSCEND-T2D-1): a double-blind, randomised, phase 3 trial

Retatrutide and the urinary tract infection signal: Is the answer hidden in timing?

A Hydrophobic Tag-Assisted Liquid-Phase Strategy for the Synthesis of Retatrutide

Rationale, design and baseline characteristics of the TRANSCEND-CKD trial of retatrutide in patients with chronic kidney disease