Metabolic

Semaglutide

Also sold as Sema

GLP-1 receptor agonist with a mature supply chain. Most vendors clear the purity bar. Quantity accuracy on 5 mg vials is what separates them.

Vendors tested: 18; of 20 listed
Samples passed: 75%; of 20 results
Median price: $10.4/mg; 5 mg vials typical

Who leads Semaglutide

Ranked by pass score: the recency weighted share of each vendor’s Semaglutide samples that met 99.5% purity, confirmed identity, and fill within 25% of the label.

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1 Atomik Labz 2 of 2 passed, latest Oct 18, 2026, sold as Peptide 1 (S) Buy Peptide 1 (S) at atomiklabz.com 99.79% avg purity $7.80/mg $39 / 5 mg 91.1
2 Solution Peptides 2 of 2 passed, latest Sep 1, 2026, sold as Peptide 1 (S) Buy Peptide 1 (S) at solutionpeptides.net 99.68% avg purity $7.80/mg $39 / 5 mg 90.2
3 Biotech Peptides 1 of 1 passed, latest Oct 8, 2026 99.60% avg purity $12.6/mg $63 / 5 mg 87.8
4 Peptide Partners 1 of 1 passed, latest Aug 14, 2026 99.58% avg purity $9.80/mg $49 / 5 mg 86.9
5 Ion Peptides 1 of 1 passed, latest Aug 8, 2026 99.66% avg purity $10.2/mg $51 / 5 mg 86.8
6 ezPeps 1 of 1 passed, latest Jul 6, 2026 99.68% avg purity $9.60/mg $48 / 5 mg 86.2
7 Particle Peptides 1 of 1 passed, latest Jun 27, 2026 99.60% avg purity $11.0/mg $55 / 5 mg 86.1
8 Swiss Chems 1 of 1 passed, latest Jun 19, 2026 99.56% avg purity $10.4/mg $52 / 5 mg 85.9
9 Skye Peptides 1 of 1 passed, latest Jun 9, 2026 99.69% avg purity $10.4/mg $52 / 5 mg 85.8
10 Core Peptides 1 of 1 passed, latest Jun 1, 2026 99.63% avg purity $12.0/mg $60 / 5 mg 85.6
11 Peptide Maxxing 1 of 1 passed, latest Apr 17, 2026 99.66% avg purity $9.40/mg $47 / 5 mg 84.9
12 Modern Aminos 1 of 1 passed, latest Apr 14, 2026 99.62% avg purity $11.6/mg $58 / 5 mg 84.9
13 Polaris Peptides 1 of 1 passed, latest Mar 12, 2026 99.66% avg purity $10.0/mg $50 / 5 mg 84.4
14 Peptidology 0 of 1 passed, latest Apr 28, 2026 99.40% avg purity $13.2/mg $66 / 5 mg 47.9
15 Limitless Biotech 0 of 1 passed, latest May 20, 2026 99.30% avg purity $11.0/mg $55 / 5 mg 46.8
16 Penguin Peptides 0 of 1 passed, latest Jun 17, 2026 98.60% avg purity $8.20/mg $41 / 5 mg 45.3
17 Southern Aminos 0 of 1 passed, latest Jul 3, 2026 99.30% avg purity $10.4/mg $52 / 5 mg 44.5
18 Simple Peptide 0 of 1 passed, latest Jul 2, 2026 98.90% avg purity $11.2/mg $56 / 5 mg 44.5

Who leads Semaglutide

Listed, not yet tested