Independent vendor review
Independently fact-checked
GLP-1 Research Lab scored across our four rubric factors — COA practices (40%), reputation, transparency, and operations (20% each).
Weighted factor result: 7.8/10. The published score follows the weighted result after rounding.
Evidence summary
Yes on the testing: GLP-1 Research Lab publishes a real third-party COA from a named US lab (Prime Analytical Laboratories, Concord CA) — the posted Tirzepatide report shows 100.0% purity by HPLC. The caveat is breadth, not legitimacy: one certificate is published so far rather than a full per-batch library, and it's purity-only.
It's a new but well-run storefront — an established operator, US-based, with card + crypto checkout, in-stock inventory, and professional cold-chain fulfillment behind it. There's no public review history yet, which is the main thing keeping it out of the top tier; expanding per-batch COAs (a new lab partnership is in progress) is the clear path up.
What we reviewed, with the limits of that evidence kept explicit.
GLP-1 Research Lab (Peptide Research Labs Inc) is a US-based research-peptide supplier focused on the GLP-1 metabolic class (Semaglutide, Tirzepatide, Retatrutide, Cagrilintide) alongside recovery, GH-secretagogue, and longevity compounds. It publishes a third-party Certificate of Analysis from Prime Analytical Laboratories, a named US lab in Concord, CA — the posted Tirzepatide report verifies 100.0% purity by HPLC with net peptide content and a clean single peak.
The testing is real and third-party, which anchors the COA factor; what holds that factor mid for now is breadth — one certificate is published rather than a per-batch library on every product page, and the panel is purity-only. The brand is new, so there isn't a public review footprint to lean on yet, but it's run by an established operator and its operations are a genuine strength: card and crypto payment, in-stock inventory, a 30% affiliate program, and professional cold-chain fulfillment. Expect the COA coverage — and the score — to rise as its new lab partnership produces per-batch COAs.
Buying details
Decision guide
Direct answers
GLP-1 Research Lab scores 8/10 in our evidence rubric: 40% COA practices, 20% reputation, 20% transparency, and 20% operations. Read the findings below for the evidence behind that number.
glp1researchlab.com is the official website of GLP-1 Research Lab. GLP-1 Research Lab scores 8/10 in our published evidence rubric. See our independent analysis above.
COA status: COA ✓ with third-party testing. Public third-party COA published on-site (a 'Download COA' on the /coa-testing page). The certificate currently posted is a real Prime Analytical Laboratories, LLC report (Concord, CA — a named US lab with a verifiable address/phone): Tirzepatide 10mg lyophilized powder, sample #008060, 100.0% purity by HPLC, net peptide content 11.68mg, single clean chromatographic peak (report QU-1007).
GLP-1 Research Lab operates out of United States.
See our /vendors page for the full ranked list. We use the same rubric for every vendor on the site, so direct comparison is straightforward.
Our evidence scores use a weighted rubric: 40% COA practices (named third-party lab, batch linkage, public availability), 20% community reputation, 20% transparency, and 20% operations. We are independently owned; affiliate status is not a scoring factor.
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PeptidePrices is independently owned and participates in GLP-1 Research Lab's affiliate program. We may be paid for qualifying purchases through our links. GLP-1 Research Lab cannot edit or approve this review, and the relationship does not add points to its score.
