Metabolic & weight managementCommonly misrepresented

Semaglutide

A long-acting GLP-1 receptor agonist. Vendor-stated purity varies widely across the market, and mass per vial is often the figure that diverges from the label rather than purity itself.

What we measure

HPLC purity (%)
Identity by LC-MS/MS
Measured mass per vial (mg)

What tends to go wrong

Under-dosed vials are the most common finding.

This is a pattern we see across submitted samples, not a claim about any particular vendor. The only way to know about your vial is to test your vial.

Optional add-ons

Heavy metals screen
ICP-MS for lead, arsenic, cadmium and mercury.
+$149
Endotoxin (LAL)
Bacterial endotoxin screening added to the same sample.
+$249
Rush — 2 business days
Moves your sample to the front of the queue on arrival.
+$199

Related compounds

Tirzepatide

Dual GIP / GLP-1 receptor agonist.

Retatrutide

Triple GLP-1 / GIP / glucagon agonist.

Mazdutide

GLP-1 / glucagon dual agonist.

CagriSema

Cagrilintide and semaglutide co-formulation.