Which vendors sell Semaglutide with independent COA testing?

28 vendors in the Merit Verified directory have independent COA evidence on file for Semaglutide — 185 COAs total. COA coverage and test dates are listed on the Semaglutide page at https://meritverified.org/peptides/semaglutide.

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

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

What is the regulatory status of Semaglutide?

Semaglutide 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 Semaglutide in your jurisdiction.

GLP-1 / Metabolic

Semaglutide

Also known as: Semaglutide (GLP-1 agonist)

Semaglutide is a GLP-1 receptor agonist used for type 2 diabetes management and chronic weight management. It mimics the incretin hormone GLP-1 to regulate appetite and glucose metabolism.

Where to buy · live market data

Who's worth your money for Semaglutide

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

🇺🇸 Prime Peptides 95

Highest Merit Score (95) of 7 scored sellers

$4.67/mg

$70.00 · 15mg · 99.2% purity

10 COAs

Buy

Best value

🇭🇰 Hkuppeptide 49

Lowest $/mg among scored sellers

$1.00/mg

$10.00 · 10mg

no COAs yet

Buy

Most tested

🇺🇸 Polaris Peptides 90

11 independent COAs on file

$9.00/mg

$90.00 · 10mg · 99.9% purity

11 COAs

Buy

Average price

$9.02/mg

range $1.00–$44.70/mg

Sellers

from $10.00

45-day trend

+12.6%

vs 45-day avg $/mg

55 of 63 sellers have a current price· 48 stale hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Prime Peptides ✓ verified at source · just now	$70.00· 15mg	$4.67/mg	-48.3%	99.2%	10	95	Buy
🇺🇸	Polaris Peptides ✓ verified at source · just now	$90.00· 10mg	$9.00/mg	-0.2%	99.9%	11	90	Buy
🇨🇳	Reta Peptide ✓ verified at source · just now	$65.00· 10mg	$6.50/mg	-28%	99.6%	7	83	Buy
🇺🇸	Blank Peptides ✓ verified at source · just now	$79.00· 10mg	$7.90/mg	-12.4%	99.9%	3	81	Buy affiliate
🇺🇸	Bulk Peptides ✓ verified at source · just now	$160· 10mg	$16.00/mg	+77.3%	99.6%	1	50	Buy
🇭🇰	Hkuppeptide ✓ verified at source · just now	$10.00· 10mg	$1.00/mg	-88.9%	—	—	49	Buy
🇭🇰	zztai Peptide Ltd ✓ verified at source · just now	$116· 30mg	$3.87/mg	-57.1%	—	—	42	Buy

Top Merit pick

🇺🇸 Prime Peptides
✓ verified at source · just now
95

$4.67/mg -48.3% vs avg

$70.00

15mg

99.2% purity 10 COAs

Buy
🇺🇸 Polaris Peptides
✓ verified at source · just now
90

$9.00/mg -0.2% vs avg

$90.00

10mg

99.9% purity 11 COAs

Buy
🇨🇳 Reta Peptide
✓ verified at source · just now
83

$6.50/mg -28% vs avg

$65.00

10mg

99.6% purity 7 COAs

Buy
🇺🇸 Blank Peptides
✓ verified at source · just now
81

$7.90/mg -12.4% vs avg

$79.00

10mg

99.9% purity 3 COAs

Buy affiliate
🇺🇸 Bulk Peptides
✓ verified at source · just now
50

$16.00/mg +77.3% vs avg

$160

10mg

99.6% purity 1 COA

Buy
🇭🇰 Hkuppeptide
✓ verified at source · just now
49

$1.00/mg -88.9% vs avg

$10.00

10mg

no purity

Buy
🇭🇰 zztai Peptide Ltd
✓ verified at source · just now
42

$3.87/mg -57.1% vs avg

$116

30mg

no purity

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 Semaglutide

CAS

910463-68-2

Molecular formula

C187H291N45O59

Typical dose range

0.25–2.4 mg (250–2400 mcg) subcutaneous once weekly; typically titrated from 0.25 mg/week, increasing every 4 weeks

Half-life

~7 days

Independent evidence

COAs for Semaglutide

185 third-party tests across 28 vendors. Each card links to the full report.

All 185 COAs for Semaglutide →

Measured purity over time

Semaglutide

Who's worth your money for Semaglutide

Watch Semaglutide

About Semaglutide

COAs for Semaglutide

23 citations indexed for Semaglutide

Burden and Risk of Depression in Patients Receiving Semaglutide: A Systematic Review and Meta-Analysis

Females Are Completely Resistant to Semaglutide-Induced Muscle Loss in ob/ob Mice

Effects of subcutaneous semaglutide on weight loss and inflammatory markers in adults with overweight or obesity without diabetes: a systematic review and meta-analysis

Effects of Oral Semaglutide on Dietary Intake and Body Composition in Japanese People With Type 2 Diabetes: A Prospective Observational Study in Clinical Practice

Semaglutide in Japanese participants with metabolic dysfunction-associated steatohepatitis: a subgroup analysis of the ESSENCE trial

Endoscopic sleeve gastroplasty versus oral semaglutide for obesity: a real-world comparative cohort study