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Vendor Transparency Comparison

Tirzepatide
Vendors Scored on Transparency

10 scored vendors carry this compound · Ranked high to low by VTS · Updated August 2026

Every vendor in PeptideClear's scored catalog that publicly lists Tirzepatide, 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 Tirzepatide. 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.

No affiliate revenue. PeptideClear takes no cut from any vendor listed here. Vendors are scored whether or not they want to be. Every scored point traces to a public source. How VTS scoring works →
Scored vendors carrying Tirzepatide (10)
Vendor Band VTS Key transparency finding
Ion Peptides ionpeptide.com Moderate 78 Lot-specific COAs linked from product pages; HPLC and MS per batch; ISO 9001:2015-aligned manufacturing stated. Public GLP-1 category confirmed on ionpeptide.com.
Ascension Peptides ascensionpeptides.com Moderate 76 Public COA library with named labs; HPLC and MS per batch. Tirzepatide listed as T-10 (10mg) and T-30 (30mg) with COA documentation on the canonical .com domain.
Peptide Crafters peptidecrafters.com Moderate 76 Triple-batch analysis with HPLC-MS, endotoxin, and sterility testing. Tirzepatide named explicitly in metabolic category copy on canonical site.
Behemoth Labz behemothlabz.com Moderate 75 Third-party testing stated per batch; COA documentation practices assessed at scoring. Tirzepatide confirmed on canonical behemothlabz.com product page.
Limitless Life Nootropics limitlesslifenootropics.com Moderate 68 COA documentation stated per batch; US-based operations. Tirzepatide-RUO confirmed at the shop domain tied to limitlesslifenootropics.com.
SwissChems swisschems.is Moderate 66 COAs with named labs publicly accessible per product; HPLC and MS stated. Tirzepatide confirmed on canonical swisschems.is product page.
Blue Sky Peptide blueskypeptide.com Limited 55 Established US vendor; COA documentation inconsistent. Tirzepatide listed as Tirz (GLP-1, GIP RA) 10mg on the public sitemap.
Apex Peptides apex-peptides.com Limited 44 60+ compound catalog; COAs available on request. Full GLP-1 class listed including tirzepatide, semaglutide, retatrutide, and cagrilintide.
Skye Peptides skyepeptides.com Low 38 74-compound catalog; limited pre-purchase COA accessibility. Tirzepatide explicitly named on the canonical site homepage.
Planet Peptide planetpeptide.com Low 26 Broad catalog; minimal verifiable documentation before purchase. Tirzepatide listed as Tirzepatide-RUO 10mg and 30mg. No named testing lab or entity details disclosed.
How to read this table
VTS measures transparency, not product quality
A high VTS score means a vendor publishes verifiable documentation about their testing process before you purchase. It is not a guarantee of purity, potency, or safety. A low VTS score means less is publicly verifiable - not that the product is necessarily inferior. The ranking exists so you can make an informed choice about what level of documentation you require for your research.
All scored vendors carrying this compound are listed, not just top scorers
This page shows every vendor PeptideClear has scored that publicly lists BPC-157. Low-scoring vendors are included because their position in the ranking is itself useful information - the gap between a 94 and a 20 tells you something meaningful about the documentation landscape for this compound.
Scores reflect publicly accessible information only
VTS is scored from what a researcher with no prior account can access and verify. COAs behind login walls, email-on-request systems, or account-gated catalogs are treated as non-public. This mirrors the experience of a real buyer comparing options before committing to a vendor.
Why some scored vendors are not on this page
BioLongevity Labs (94/High) and Verified Peptides (80/High) do not publicly carry tirzepatide as of August 2026. Protide Health (88/High) lists tirzepatide under a coded name but requires account login to access. Excluded here under the same public-visibility standard applied across all comparison pages.
Vendor carry data verified from each vendor's canonical domain, August 2026. VTS scores reflect the most recent scoring log for each vendor - see individual vendor pages for full dimension breakdowns and sourcing. VTS measures process transparency from publicly available materials only. It is not a certification of product safety, purity, or efficacy. PeptideClear has no affiliate, referral, or commercial relationship with any vendor listed on this page. Vendors are scored whether or not they want to be. VTS methodology →