Which vendors sell Retatrutide with independent COA testing?

43 vendors in the Merit Verified directory have independent COA evidence on file for Retatrutide — 429 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).

Real-time market data

Pricing for Retatrutide

Live vendor pricing, normalized to $/mg so sizes compare fairly — fused with each seller's Merit trust score and latest independent COA purity. Prices refresh daily.

Average price

$7.19/mg

range $1.00–$33.68/mg

Sellers

from $0.00

45-day trend

-5.2%

vs 45-day avg $/mg

72 of 80 sellers have a current price· 49 stale listings hidden (not seen in 7 days)

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Peptide Partners via Disclosed Labs · just now	$1512· 480mg	$3.15/mg	-56.2%	99.8%	55	99	Buy
🇺🇸	Reta One Labs via Disclosed Labs · just now	$239· 60mg	$3.98/mg	-44.6%	99.8%	58	95
🇺🇸	Profound Aminos via Disclosed Labs · just now	$296· 60mg	$4.93/mg	-31.4%	99.8%	31	95	Buy
🇺🇸	Orbitrex Peptides via Disclosed Labs · just now	$200· 36mg	$5.56/mg	-22.8%	99.8%	20	95
🇺🇸	Prime Peptides via Disclosed Labs · just now	$450· 60mg	$7.50/mg	+4.3%	99.5%	7	95	Buy
🇺🇸	Licensed Peptides ✓ verified at source · 1d ago	$2021· 60mg	$33.68/mg	+368.2%	99.7%	1	95	Buy code MERIT · 5% off
🇺🇸	Forge Performance Co. via Disclosed Labs · just now	$180· 30mg	$6.00/mg	-16.6%	99.7%	6	94	Buy code MERIT · 10% off
🇺🇸	Riptide Wellness via Disclosed Labs · just now	$290· 50mg	$5.80/mg	-19.4%	—	—	92
🇺🇸	Sunrise Bioresearch via Disclosed Labs · just now	$68.81· 20mg	$3.44/mg	-52.2%	100.0%	7	88
🇺🇸	Simple Peptide via Disclosed Labs · just now	$359· 48mg	$7.48/mg	+4%	99.8%	22	85	Buy
	Peptide Supply Co. via Disclosed Labs · just now	$800· 600mg	$1.33/mg	-81.5%	99.6%	4	83
🇨🇳	Reta Peptide ✓ verified at source · just now	$135· 10mg	$13.50/mg	+87.7%	99.5%	14	83
🇺🇸	Blank Peptides ✓ verified at source · just now	$130· 30mg	$4.33/mg	-39.7%	99.5%	4	81
🇺🇸	OROS Research via Disclosed Labs · just now	$230· 20mg	$11.50/mg	+59.9%	99.0%	1	79
🇺🇸	Texpeptide ✓ verified at source · 1d ago	$100· 10mg	$10.00/mg	+39%	99.7%	2	65	Buy
🇭🇰	Hkuppeptide ✓ verified at source · just now	$10.00· 10mg	$1.00/mg	-86.1%	99.8%	1	50
🇭🇰	zztai Peptide Ltd ✓ verified at source · just now	$280· 30mg	$9.33/mg	+29.8%	99.9%	1	43
🇺🇸	Alpha Peptides via Disclosed Labs · just now	$165· 50mg	$3.30/mg	-54.1%	—	—	Unscored
🇺🇸	NG Peptide via Disclosed Labs · just now	$165· 50mg	$3.30/mg	-54.1%	—	—	Unscored
	volterasciences.com via Disclosed Labs · just now	$200· 60mg	$3.33/mg	-53.7%	—	—	Unscored
	peptidetech.is via Disclosed Labs · just now	$280· 60mg	$4.67/mg	-35.1%	—	—	Unscored
	optimasupply.is via Disclosed Labs · just now	$530· 60mg	$8.83/mg	+22.8%	—	—	Unscored
	realpeptides.co via Disclosed Labs · just now	$300· 24mg	$12.50/mg	+73.8%	—	—	Unscored

Top Merit pick

🇺🇸 Peptide Partners
via Disclosed Labs · just now
99

$3.15/mg -56.2% vs avg

$1512

480mg

99.8% purity 55 COAs

Buy
🇺🇸 Reta One Labs
via Disclosed Labs · just now
95

$3.98/mg -44.6% vs avg

$239

60mg

99.8% purity 58 COAs
🇺🇸 Profound Aminos
via Disclosed Labs · just now
95

$4.93/mg -31.4% vs avg

$296

60mg

99.8% purity 31 COAs

Buy
🇺🇸 Orbitrex Peptides
via Disclosed Labs · just now
95

$5.56/mg -22.8% vs avg

$200

36mg

99.8% purity 20 COAs
🇺🇸 Prime Peptides
via Disclosed Labs · just now
95

$7.50/mg +4.3% vs avg

$450

60mg

99.5% purity 7 COAs

Buy
🇺🇸 Licensed Peptides
✓ verified at source · 1d ago
95

$33.68/mg +368.2% vs avg

$2021

60mg

99.7% purity 1 COA

Buy code MERIT · 5% off
🇺🇸 Forge Performance Co.
via Disclosed Labs · just now
94

$6.00/mg -16.6% vs avg

$180

30mg

99.7% purity 6 COAs

Buy code MERIT · 10% off
🇺🇸 Riptide Wellness
via Disclosed Labs · just now
92

$5.80/mg -19.4% vs avg

$290

50mg

no purity
🇺🇸 Sunrise Bioresearch
via Disclosed Labs · just now
88

$3.44/mg -52.2% vs avg

$68.81

20mg

100.0% purity 7 COAs
🇺🇸 Simple Peptide
via Disclosed Labs · just now
85

$7.48/mg +4% vs avg

$359

48mg

99.8% purity 22 COAs

Buy
Peptide Supply Co.
via Disclosed Labs · just now
83

$1.33/mg -81.5% vs avg

$800

600mg

99.6% purity 4 COAs
🇨🇳 Reta Peptide
✓ verified at source · just now
83

$13.50/mg +87.7% vs avg

$135

10mg

99.5% purity 14 COAs
🇺🇸 Blank Peptides
✓ verified at source · just now
81

$4.33/mg -39.7% vs avg

$130

30mg

99.5% purity 4 COAs
🇺🇸 OROS Research
via Disclosed Labs · just now
79

$11.50/mg +59.9% vs avg

$230

20mg

99.0% purity 1 COA
🇺🇸 Texpeptide
✓ verified at source · 1d ago
65

$10.00/mg +39% vs avg

$100

10mg

99.7% purity 2 COAs

Buy
🇭🇰 Hkuppeptide
✓ verified at source · just now
50

$1.00/mg -86.1% vs avg

$10.00

10mg

99.8% purity 1 COA
🇭🇰 zztai Peptide Ltd
✓ verified at source · just now
43

$9.33/mg +29.8% vs avg

$280

30mg

99.9% purity 1 COA
🇺🇸 Alpha Peptides
via Disclosed Labs · just now
Unscored

$3.30/mg -54.1% vs avg

$165

50mg

no purity
🇺🇸 NG Peptide
via Disclosed Labs · just now
Unscored

$3.30/mg -54.1% vs avg

$165

50mg

no purity
volterasciences.com
via Disclosed Labs · just now
Unscored

$3.33/mg -53.7% vs avg

$200

60mg

no purity
peptidetech.is
via Disclosed Labs · just now
Unscored

$4.67/mg -35.1% vs avg

$280

60mg

no purity
optimasupply.is
via Disclosed Labs · just now
Unscored

$8.83/mg +22.8% vs avg

$530

60mg

no purity
realpeptides.co
via Disclosed Labs · just now
Unscored

$12.50/mg +73.8% vs avg

$300

24mg

no purity

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.

Independent evidence

COAs for Retatrutide

429 third-party tests across 43 vendors. Each card links to the full report.

All 429 COAs for Retatrutide →

Measured purity over time

Retatrutide

Pricing for 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

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

Retatrutide And Lipid And Metabolite Profiles In Participants With Obesity With Or Without Type 2 Diabetes

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