Riftline Labs
Minneapolis · St. Paul
Independent analytical testing US-domestic

Three peptides.
Tested properly.
Every batch.

Riftline Labs runs independent purity and identity testing on a deliberately narrow catalog — retatrutide, tirzepatide, and semaglutide. A named analyst signs every report, and every report verifies on its own, without going through us.

Tell us what you're running Verify a report
Fig. 01 — Catalog index 03 / 03
01 RetatrutideGLP-1 / GIP / Glucagon
02 TirzepatideGLP-1 / GIP
03 SemaglutideGLP-1

Purity by HPLC-UV. Identity confirmed by LC-MS.

01

The catalog

We run these three, constantly. That is the entire point.

GLP-1 / GIP / Glucagon
Retatrutide

Purity by HPLC-UV. Identity confirmed by LC-MS.

GLP-1 / GIP
Tirzepatide

Purity by HPLC-UV. Identity confirmed by LC-MS.

GLP-1
Semaglutide

Purity by HPLC-UV. Identity confirmed by LC-MS.

We decline work outside the catalog. A lab that runs three analytes every week is better at those three than a lab that runs two hundred. Narrow scope is what keeps the method consistent, the turnaround predictable, and the result worth forwarding to your customers.
02

Built to be checked, not believed

A certificate of analysis is only worth what it survives. Your customers ask you where the third-party test is; what you hand them has to hold up when they go looking. So every part of ours is designed to be independently confirmed.

What you get Why it matters downstream
01 A named analyst The person who signed the report is identifiable and reachable. Anonymous reports are worth exactly as much as the anonymity suggests.
02 An independently verifiable report Each report carries a unique ID. Anyone holding it can confirm it is genuine and unaltered — without contacting you, and without contacting us.
03 A stated scope Purity by HPLC-UV and identity by LC-MS, named on the report. No ambiguity about what was measured and what wasn't.
04 US-domestic handling Samples stay in the United States. No international shipping leg, no customs hold on your batch release.
03

How it works

  1. 1

    Check the catalog

    If you move retatrutide, tirzepatide, or semaglutide in recurring batches, you're the operator we're built for.

  2. 2

    Tell us your analytes and cadence

    Takes two minutes, and it's how we decide whether we're a fit for each other.

  3. 3

    Start with one batch

    A single paid compatibility run before anything recurring — so you can judge the work rather than the pitch.

  4. 4

    Run it every batch

    Once it fits, it's routine.

Tell us what you're running