Which vendors sell Retatrutide with independent COA testing?

54 vendors in the Merit Verified directory have independent COA evidence on file for Retatrutide — 504 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

🇺🇸 Peptide Partners 99

Highest Merit Score (99) of 24 scored sellers

$3.15/mg

$1512 · 480mg · 99.8% purity

55 COAs

Buy

Best value after code

🇺🇸 Licensed Peptides 95

$0.92/mg effective with 5% code

$0.97/mg

$57.99 · 60mg · 99.8% purity

9 COAs

Buy Code MERIT · 5% off

Most tested

🇺🇸 Reta One Labs 95

61 independent COAs on file

$2.69/mg

$404 · 150mg · 99.8% purity

61 COAs

Buy affiliate

Average price

$6.10/mg

range $0.97–$36.00/mg

Sellers

from $10.00

45-day trend

-7.4%

vs 45-day avg $/mg

41 of 48 sellers have a current price· 11 stale hidden· 6 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Peptide Partners via Disclosed Labs · 10h ago	$1512· 480mg	$3.15/mg	-48.3%	99.8%	55	99	Buy
🇺🇸	Licensed Peptides ✓ verified at source · 3d ago · stale	$57.99· 60mg	$0.97/mg	-84.2%	99.8%	9	95	Buy Code MERIT · 5% off
🇺🇸	Reta One Labs via Disclosed Labs · 10h ago	$404· 150mg	$2.69/mg	-55.8%	99.8%	61	95	Buy affiliate
🇺🇸	Profound Aminos via Disclosed Labs · 10h ago	$251· 60mg	$4.18/mg	-31.4%	99.8%	31	95	Buy
🇺🇸	Prime Peptides via Disclosed Labs · 10h ago	$325· 60mg	$5.42/mg	-11.2%	99.5%	7	95	Buy
🇺🇸	Orbitrex Peptides via Disclosed Labs · 10h ago	$200· 36mg	$5.56/mg	-8.9%	99.8%	20	95	Buy Code Orbitrex10 · 10% off
🇺🇸	Sunrise Bioresearch via Disclosed Labs · 10h ago	$359· 200mg	$1.79/mg	-70.6%	100.0%	13	94	Buy
🇺🇸	Forge Performance Co. via Disclosed Labs · 10h ago	$160· 30mg	$5.33/mg	-12.5%	99.7%	6	94	Buy Code MERIT · 10% off
	Nova Peptides via Disclosed Labs · 10h ago	$325· 50mg	$6.50/mg	+6.6%	—	—	94	Buy
🇺🇸	Ignite Peptides via Disclosed Labs · 10h ago	$120· 20mg	$6.00/mg	-1.6%	99.5%	2	93	Buy Code MERIT · 10% off

Top Merit pick

🇺🇸 Peptide Partners
via Disclosed Labs · 10h ago
99

$3.15/mg -48.3% vs avg

$1512

480mg

99.8% purity 55 COAs

Buy
🇺🇸 Licensed Peptides
✓ verified at source · 3d ago · stale
95

$0.97/mg -84.2% vs avg

$57.99

60mg

99.8% purity 9 COAs

Buy Code MERIT · 5% off
🇺🇸 Reta One Labs
via Disclosed Labs · 10h ago
95

$2.69/mg -55.8% vs avg

$404

150mg

99.8% purity 61 COAs

Buy affiliate
🇺🇸 Profound Aminos
via Disclosed Labs · 10h ago
95

$4.18/mg -31.4% vs avg

$251

60mg

99.8% purity 31 COAs

Buy
🇺🇸 Prime Peptides
via Disclosed Labs · 10h ago
95

$5.42/mg -11.2% vs avg

$325

60mg

99.5% purity 7 COAs

Buy
🇺🇸 Orbitrex Peptides
via Disclosed Labs · 10h ago
95

$5.56/mg -8.9% vs avg

$200

36mg

99.8% purity 20 COAs

Buy Code Orbitrex10 · 10% off
🇺🇸 Sunrise Bioresearch
via Disclosed Labs · 10h ago
94

$1.79/mg -70.6% vs avg

$359

200mg

100.0% purity 13 COAs

Buy
🇺🇸 Forge Performance Co.
via Disclosed Labs · 10h ago
94

$5.33/mg -12.5% vs avg

$160

30mg

99.7% purity 6 COAs

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

$6.50/mg +6.6% vs avg

$325

50mg

no purity

Buy
🇺🇸 Ignite Peptides
via Disclosed Labs · 10h ago
93

$6.00/mg -1.6% vs avg

$120

20mg

99.5% purity 2 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.