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 19 listed
Samples passed: 75%; of 20 results
Median price: $7.80/mg; 5 mg vials typical

Who leads Semaglutide

Vendors with independent results for Semaglutide, ordered by overall score. The pass counts and average purity shown are for this compound only, judged against 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 94.9 Overall
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 92.4 Overall
3 Ion Peptides 1 of 1 passed, latest Aug 8, 2026, sold as ION-1S Buy ION-1S at ionpeptide.com 99.66% avg purity $7.80/mg $39 / 5 mg 89.9 Overall
4 ezPeps 1 of 1 passed, latest Jul 6, 2026, sold as GLP-1-SG Buy GLP-1-SG at ezpeps.com 99.68% avg purity $9.20/mg $46 / 5 mg 89.4 Overall
5 Peptide Partners 1 of 1 passed, latest Aug 14, 2026 Buy Semaglutide at peptide.partners 99.58% avg purity $5.70/mg $285 / 50 mg 87.9 Overall
6 Modern Aminos 1 of 1 passed, latest Apr 14, 2026, sold as MA-1S Buy MA-1S at modernaminos.com 99.62% avg purity $6.80/mg $34 / 5 mg 86.5 Overall
7 Simple Peptide 0 of 1 passed, latest Jul 2, 2026 98.90% avg purity n/a no listing 84.8 Overall
8 Peptidology 0 of 1 passed, latest Apr 28, 2026 99.40% avg purity n/a no listing 84.1 Overall
9 Peptide Maxxing 1 of 1 passed, latest Apr 17, 2026 99.66% avg purity n/a no listing 82.5 Overall
10 Skye Peptides 1 of 1 passed, latest Jun 9, 2026, sold as GLP-1 S Buy GLP-1 S at skyepeptides.com 99.69% avg purity $11.5/mg $69 / 6 mg 81.7 Overall
11 Southern Aminos 0 of 1 passed, latest Jul 3, 2026 99.30% avg purity n/a no listing 79.5 Overall
12 Particle Peptides 1 of 1 passed, latest Jun 27, 2026 99.60% avg purity n/a no listing 76.4 Overall
13 Polaris Peptides 1 of 1 passed, latest Mar 12, 2026 Buy Semaglutide at polarispeptides.com 99.66% avg purity $10.0/mg $50 / 5 mg 73.3 Overall
14 Biotech Peptides 1 of 1 passed, latest Oct 8, 2026 99.60% avg purity n/a no listing 66.0 Overall
15 Core Peptides 1 of 1 passed, latest Jun 1, 2026 99.63% avg purity n/a no listing 61.7 Overall
16 Limitless Biotech 0 of 1 passed, latest May 20, 2026 99.30% avg purity n/a no listing 58.7 Overall
17 Swiss Chems 1 of 1 passed, latest Jun 19, 2026 99.56% avg purity n/a no listing 50.9 Overall
18 Penguin Peptides 0 of 1 passed, latest Jun 17, 2026, sold as GLP-1 S Buy GLP-1 S at penguinpeptides.com 98.60% avg purity $11.8/mg $59 / 5 mg 50.3 Overall

Listed, not yet tested

Crush Research as Single Agonist 10mg $2.90/mg