Tiers name what a vendor publishes, not a verdict on any product's purity or quality.
Lab-verifiable COAs: certificates that open on the testing lab's own site (the seal's ring shows what share of them do).
Third-party COAs: certificates attributed to a third-party lab, which may be hosted only on the vendor's site.
Tiers follow the Vendor Score (90+ and 80–89), which is 87% COA evidence; the numeral in each seal is that score.
Affiliate relationships never affect tiers, selection or order. How the Vendor Score works
A GLP-1/glucagon dual-agonist candidate studied in metabolic research.
Evidence brief
Mazdutide is a glucagon-receptor / GLP-1-receptor dual agonist developed for weight management and type 2 diabetes; in June 2025 it received its first approval, in China, followed by a diabetes approval in September 2025.
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Mazdutide · all tracked vendors · all tracked peptide listings, including out-of-stock products. Prices and stock reflect the last check. Non-comparable products do not enter market rankings. Trust scores measure published evidence, not product safety.
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COACertificate of Analysis: a lab report stating a batch's measured identity and purity.Certificate of Analysis: a lab report stating a batch's measured identity and purity. availability: 16 of 16 tracked sources for Mazdutide publish a COA
— 12 with at least one certificate you can open at the testing lab : RUO.bio (91 at the lab) , Nationwide Peptides (88 at the lab) , Tegridy Research (81 at the lab) , Penguin Peptides (47 at the lab) , Optima Supply (36 at the lab) , NextGenPeps (20 at the lab) , Modern Aminos (19 at the lab) , Alpha Peptides (4 at the lab) , Glacier Aminos (3 at the lab) , Happy Peptides (2 at the lab) , Southern Aminos (1 at the lab) , Welli Labs (1 at the lab), and 4 more — every one of them is a linked row in the table above. What a COA proves →
Mazdutide is a glucagon-receptor / GLP-1-receptor dual agonist developed for weight management and type 2 diabetes; in June 2025 it received its first approval, in China, followed by a diabetes approval in September 2025.
Source-linked reference figures with the population and study context alongside each amount. Study arms are not a starting dose, titration schedule, or personal treatment plan. Label records refer to the named approved medicine, not vendor products.
Dose administered in a phase 3 randomised double-blind trial (GLORY-1) (human, Chinese adults with overweight or obesity)
4 mg once weekly or 6 mg once weekly
human · Chinese adults with overweight or obesity · phase 3 randomised double-blind trial (GLORY-1)
Research use only — this reports what an FDA label or a peer-reviewed study published, tied to its species and study context. It is not medical advice, not a recommendation to use, and no dose here is generated by pepmg. Any dosing decision is for a qualified professional. Animal-study amounts do not establish a human dose.
All products listed are sold by third-party vendors for laboratory and research use only (RUO). Where an FDA label or a peer-reviewed study has published a dose, pepmg reports it with the source named, because that is safer than guessing. It is a report, not medical advice and not a recommendation to use anything. pepmg sells nothing and ships nothing. Listings are price-tracking data, not endorsements.
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