Semaglutide price comparison

Semaglutide is a synthetic analog of the human glucagon-like peptide-1 (GLP-1) hormone, primarily studied in research for its effects on glucose metabolism and appetite regulation. This peptide is commonly investigated in laboratory settings for its potential in metabolic and obesity-related research models.

cheapest (first-party)

$5.95/mg

median

$11.00

highest

$22.00

spread

3.7×

first-party vendors

Fair-price band · 7 first-party vendors · $/mg

median $11.00

$5.95cheapest $22.00highest

The priciest vendor charges 3.7× the cheapest — buying blind on Semaglutide can cost up to $16.05/mg more.

first-party prices captured 50m ago

● Semaglutide · first-party live prices first-party · live 7 listings

#	Vendor	Product	Size	Price	$/mg	Trend	Code
1	Peptira	SEMA-1 \| 20MG first-party · captured 52m ago · earns pepmg $0 · source ↗ · COA ↗	20mg	$119.00	$5.95		—	buy →
2	Peptira	SEMA-1 \| 10MG first-party · captured 52m ago · earns pepmg $0 · source ↗ · COA ↗	10mg	$69.00	$6.90		—	buy →
3	Prime Peptides	Semaglutide 15mg first-party · captured 51m ago · earns pepmg $0 · source ↗ · COA ↗	15mg	$130.00	$8.67	·	—	buy →
4	Prime Peptides	Semaglutide 10mg first-party · captured 51m ago · earns pepmg $0 · source ↗ · COA ↗	10mg	$110.00	$11.00	·	—	buy →
5	Prime Peptides	Semaglutide 5mg first-party · captured 51m ago · earns pepmg $0 · source ↗ · COA ↗	5mg	$80.00	$16.00	·	—	buy →
6	LiveWell Peptides	Semaglutide (GLP-1 Receptor Agonist) Research Peptide 10-mg first-party · captured 50m ago · earns pepmg $0 · source ↗	10mg	$190.00	$19.00	·	—	buy →
7	LiveWell Peptides	Semaglutide (GLP-1 Receptor Agonist) Research Peptide 5-mg first-party · captured 50m ago · earns pepmg $0 · source ↗	5mg	$110.00	$22.00	·	—	buy →

COA availability: 2 of 3 vendors selling Semaglutide publish a COA — 2 lab-hosted: Peptira (lab-hosted), Prime Peptides (lab-hosted). What a COA proves →

▸ Why compare $/mg for Semaglutide?

Per-mg prices for semaglutide vary significantly across vendors due to differences in synthesis purity, scale, and sourcing of raw materials. Comparing prices helps researchers identify cost-effective suppliers while maintaining quality standards for reproducible experimental results.

▸ Reading the COA

A third-party Certificate of Analysis (COA) for semaglutide should confirm identity via mass spectrometry (e.g., ESI-MS) and purity ≥98% by HPLC. Common issues include under-filling (e.g., actual content below labeled mg/vial) and adulteration with truncated or oxidized peptide fragments.

▸ FAQ

How should I store semaglutide for research use?

Lyophilized semaglutide should be stored at -20°C or below, protected from light and moisture. Reconstituted solutions are typically stable for short periods at 2-8°C, but researchers should verify stability data from the supplier.

What is a Certificate of Analysis (COA) and why is it important?

A COA is a document from the supplier or third-party lab detailing the compound’s identity, purity, and batch-specific test results. It is critical for verifying that the peptide meets research-grade specifications and is free from contaminants.

Why do prices for semaglutide differ so much between vendors?

Price differences arise from factors like synthesis scale, purification methods (e.g., HPLC vs. flash chromatography), and vendor overhead. Lower prices may indicate lower purity or under-filling, so researchers should always check COAs before purchase.

▸ Same cluster

Retatrutide	$5.97/mg
Tirzepatide	$3.32/mg
Cagrilintide	$6.60/mg
AOD-9604	$7.00/mg

→ Reconstitution calculator for Semaglutide research math.

All products listed are sold by third-party vendors for laboratory and research use only (RUO). pepmg sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Listings are price-tracking data, not endorsements.