Every vendor in PeptideClear's scored catalog that publicly lists Semaglutide, ranked by their Vendor Transparency Score. The transparency landscape for this compound is notably asymmetric: the two highest-scoring vendors in the full catalog - BioLongevity Labs (94/High) and Verified Peptides (80/High) - do not publicly carry Semaglutide. The vendors that do skew toward mid-Moderate and lower bands. Several high-transparency US vendors have stepped back from the GLP-1 class given the regulatory environment, while vendors with offshore domains or lower documentation standards continue to list it. If you are sourcing this compound regardless, transparency is the variable within your control - and the gap between the top and bottom of this table is substantial.
| Vendor | Band | VTS | Key transparency finding |
|---|---|---|---|
| Ion Peptides ionpeptide.com | Moderate | 78 | Lot-specific COAs linked from product pages; HPLC and MS testing per batch; WHO GMP and ISO 9001:2015-aligned manufacturing stated. Public GLP-1 category on canonical ionpeptide.com. |
| Ascension Peptides ascensionpeptides.com | Moderate | 76 | Public COA library with named labs (SafeCert Labs, MZ Biolabs); HPLC and MS per batch; lot numbers match vials. Full GLP-1 range on a US .com domain - uncommon for transparent vendors in this class. |
| Peptide Crafters peptidecrafters.com | Moderate | 76 | Triple-batch analysis with HPLC-MS, endotoxin, and sterility testing; US lyophilization stated. Semaglutide named explicitly on homepage alongside product copy. |
| Limitless Life Nootropics limitlesslifenootropics.com | Moderate | 68 | COA documentation stated per batch; US-based operations. Semaglutide (GLP-1 S) confirmed at the .st shop domain tied to limitlesslifenootropics.com. |
| SwissChems swisschems.is | Moderate | 66 | COAs with named labs publicly accessible per product; HPLC and MS testing stated. Operates on a .is domain; carries full GLP-1 range. Semaglutide carry status confirmed via review index anchored to swisschems.is. |
| Blue Sky Peptide blueskypeptide.com | Limited | 55 | Established US vendor since the mid-2010s; COA documentation inconsistent. Semaglutide 5mg confirmed on the public sitemap at blueskypeptide.com. |
| Apex Peptides apex-peptides.com | Limited | 44 | 60+ compound catalog; COAs available on request rather than published per batch. Full metabolic GLP-1 range listed including semaglutide, tirzepatide, retatrutide, and cagrilintide. |
| Skye Peptides skyepeptides.com | Low | 38 | 74-compound catalog with GLP-1 analogs listed; COA documentation present but limited pre-purchase public accessibility. No named testing lab identified at time of scoring. |
| Planet Peptide planetpeptide.com | Low | 26 | Broad catalog; minimal verifiable documentation publicly accessible before purchase. Semaglutide listed as Semaglutide-RUO 10mg. No named testing lab or entity details disclosed. |