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).

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

$7.80/mg

range $1.00–$38.00/mg

Sellers

from $0.00

45-day trend

+3.5%

vs 45-day avg $/mg

72 of 81 sellers have a current price· 48 stale listings hidden (not seen in 7 days)

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Reta One Labs via Disclosed Labs · 4h ago	$239· 60mg	$3.98/mg	-49%	99.8%	58	95
🇺🇸	Profound Aminos via Disclosed Labs · 4h ago	$296· 60mg	$4.93/mg	-36.8%	99.8%	31	95	Buy
🇺🇸	Orbitrex Peptides via Disclosed Labs · 4h ago	$200· 36mg	$5.56/mg	-28.8%	99.8%	20	95
🇺🇸	Prime Peptides via Disclosed Labs · 4h ago	$450· 60mg	$7.50/mg	-3.9%	99.5%	7	95	Buy
🇺🇸	Licensed Peptides ✓ verified at source · 3h ago	$2021· 60mg	$33.68/mg	+331.5%	99.7%	1	95	Buy code MERIT · 5% off
🇺🇸	Forge Performance Co. ✓ verified at source · 3h ago	$160· 10mg	$16.00/mg	+105%	99.7%	6	94	Buy code MERIT · 10% off
🇺🇸	Riptide Wellness via Disclosed Labs · 4h ago	$290· 50mg	$5.80/mg	-25.7%	—	—	92
🇺🇸	Sunrise Bioresearch via Disclosed Labs · 4h ago	$68.81· 20mg	$3.44/mg	-55.9%	99.9%	12	88
🇺🇸	Simple Peptide via Disclosed Labs · 4h ago	$359· 48mg	$7.48/mg	-4.1%	99.8%	22	85	Buy
	Peptide Supply Co. via Disclosed Labs · 4h ago	$800· 600mg	$1.33/mg	-82.9%	99.6%	4	83
🇨🇳	Reta Peptide ✓ verified at source · 4d ago · stale	$135· 10mg	$13.50/mg	+73%	99.5%	14	83
🇺🇸	Blank Peptides ✓ verified at source · 4h ago	$130· 30mg	$4.33/mg	-44.5%	99.5%	4	81
🇺🇸	OROS Research via Disclosed Labs · 4h ago	$230· 20mg	$11.50/mg	+47.3%	99.0%	1	79
🇺🇸	Texpeptide ✓ verified at source · 3h ago	$100· 10mg	$10.00/mg	+28.1%	99.7%	3	70	Buy
🇭🇰	Hkuppeptide ✓ verified at source · 4h ago	$10.00· 10mg	$1.00/mg	-87.2%	99.8%	1	50
🇭🇰	zztai Peptide Ltd ✓ verified at source · 4d ago · stale	$280· 30mg	$9.33/mg	+19.6%	99.9%	1	43
🇺🇸	NG Peptide via Disclosed Labs · 4h ago	$165· 50mg	$3.30/mg	-57.7%	—	—	Unscored
	volterasciences.com via Disclosed Labs · 4h ago	$200· 60mg	$3.33/mg	-57.3%	—	—	Unscored
🇺🇸	Alpha Peptides via Disclosed Labs · 4h ago	$170· 50mg	$3.40/mg	-56.4%	—	—	Unscored
	peptidetech.is via Disclosed Labs · 4h ago	$280· 60mg	$4.67/mg	-40.2%	—	—	Unscored
🇺🇸	Polaris Peptides ✓ verified at source · 4h ago	$130· 15mg	$8.67/mg	+11%	—	—	Unscored
	optimasupply.is via Disclosed Labs · 4h ago	$530· 60mg	$8.83/mg	+13.2%	—	—	Unscored
	realpeptides.co via Disclosed Labs · 4h ago	$300· 24mg	$12.50/mg	+60.2%	—	—	Unscored
🇺🇸	Bulk Peptides ✓ verified at source · 4h ago	$380· 10mg	$38.00/mg	+386.9%	—	—	Unscored

Top Merit pick

🇺🇸 Reta One Labs
via Disclosed Labs · 4h ago
95

$3.98/mg -49% vs avg

$239

60mg

99.8% purity 58 COAs
🇺🇸 Profound Aminos
via Disclosed Labs · 4h ago
95

$4.93/mg -36.8% vs avg

$296

60mg

99.8% purity 31 COAs

Buy
🇺🇸 Orbitrex Peptides
via Disclosed Labs · 4h ago
95

$5.56/mg -28.8% vs avg

$200

36mg

99.8% purity 20 COAs
🇺🇸 Prime Peptides
via Disclosed Labs · 4h ago
95

$7.50/mg -3.9% vs avg

$450

60mg

99.5% purity 7 COAs

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

$33.68/mg +331.5% vs avg

$2021

60mg

99.7% purity 1 COA

Buy code MERIT · 5% off
🇺🇸 Forge Performance Co.
✓ verified at source · 3h ago
94

$16.00/mg +105% vs avg

$160

10mg

99.7% purity 6 COAs

Buy code MERIT · 10% off
🇺🇸 Riptide Wellness
via Disclosed Labs · 4h ago
92

$5.80/mg -25.7% vs avg

$290

50mg

no purity
🇺🇸 Sunrise Bioresearch
via Disclosed Labs · 4h ago
88

$3.44/mg -55.9% vs avg

$68.81

20mg

99.9% purity 12 COAs
🇺🇸 Simple Peptide
via Disclosed Labs · 4h ago
85

$7.48/mg -4.1% vs avg

$359

48mg

99.8% purity 22 COAs

Buy
Peptide Supply Co.
via Disclosed Labs · 4h ago
83

$1.33/mg -82.9% vs avg

$800

600mg

99.6% purity 4 COAs
🇨🇳 Reta Peptide
✓ verified at source · 4d ago · stale
83

$13.50/mg +73% vs avg

$135

10mg

99.5% purity 14 COAs
🇺🇸 Blank Peptides
✓ verified at source · 4h ago
81

$4.33/mg -44.5% vs avg

$130

30mg

99.5% purity 4 COAs
🇺🇸 OROS Research
via Disclosed Labs · 4h ago
79

$11.50/mg +47.3% vs avg

$230

20mg

99.0% purity 1 COA
🇺🇸 Texpeptide
✓ verified at source · 3h ago
70

$10.00/mg +28.1% vs avg

$100

10mg

99.7% purity 3 COAs

Buy
🇭🇰 Hkuppeptide
✓ verified at source · 4h ago
50

$1.00/mg -87.2% vs avg

$10.00

10mg

99.8% purity 1 COA
🇭🇰 zztai Peptide Ltd
✓ verified at source · 4d ago · stale
43

$9.33/mg +19.6% vs avg

$280

30mg

99.9% purity 1 COA
🇺🇸 NG Peptide
via Disclosed Labs · 4h ago
Unscored

$3.30/mg -57.7% vs avg

$165

50mg

no purity
volterasciences.com
via Disclosed Labs · 4h ago
Unscored

$3.33/mg -57.3% vs avg

$200

60mg

no purity
🇺🇸 Alpha Peptides
via Disclosed Labs · 4h ago
Unscored

$3.40/mg -56.4% vs avg

$170

50mg

no purity
peptidetech.is
via Disclosed Labs · 4h ago
Unscored

$4.67/mg -40.2% vs avg

$280

60mg

no purity
🇺🇸 Polaris Peptides
✓ verified at source · 4h ago
Unscored

$8.67/mg +11% vs avg

$130

15mg

no purity
optimasupply.is
via Disclosed Labs · 4h ago
Unscored

$8.83/mg +13.2% vs avg

$530

60mg

no purity
realpeptides.co
via Disclosed Labs · 4h ago
Unscored

$12.50/mg +60.2% vs avg

$300

24mg

no purity
🇺🇸 Bulk Peptides
✓ verified at source · 4h ago
Unscored

$38.00/mg +386.9% vs avg

$380

10mg

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

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

All 442 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

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

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