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Retatrutide testing and certificate of analysis.
Triple GIP / GLP-1 / glucagon receptor agonist (LY3437943).
The short answer
Retatrutide is tested by reverse-phase HPLC (UV 214 nm): chromatographic purity plus duplicate quantification in mg per vial against a characterized in-house standard (no pharmacopoeial monograph exists). Identity is assessed by retention time against the same standard, with mass-spectrometry confirmation available as an add-on. €149 per vial, 48–72 h target turnaround, and every report verifiable.
What the analysis measures
Purity, quantity, identity
- Chromatographic purity (%). The main peak's share of total integrated area at UV 214 nm. It is a ratio of peptide-related peaks — not a claim about absolute mass content.
- Quantity (mg/vial). Measured content against a characterized in-house standard (no pharmacopoeial monograph exists), run in duplicate; both values appear on the certificate next to the label claim.
- Identity. Retention time against the reference standard. That is presumptive identity, and the certificate says so; a mass-spectrometry match (+€79 add-on) confirms it conclusively.
The complete method — column, gradient, wavelength, limits — is published on the open method page.
Reference parameters
The molecule on paper
| Molecular weight | ≈4731 Da (published literature) |
| Class | Triple GIP / GLP-1 / glucagon receptor agonist (LY3437943). |
| Also seen as | LY3437943 |
| Tariff category | GLP-1 & metabolic |
| Reference basis | A characterized in-house standard (no pharmacopoeial monograph exists) |
No public compound-database record exists for this analyte; values marked as literature are from the published scientific record. Your supplier's salt form and net-peptide content will differ from free-peptide values.
Worth knowing
Before you test Retatrutide
Retatrutide has no pharmacopoeial monograph and, at the time of writing, no public compound-database record — the reference is a characterized in-house standard: a lot we have characterized by mass spectrometry and assigned content to by mass balance. The certificate states this basis explicitly, together with the slightly wider quantification uncertainty it implies. When a monograph or official standard appears, the method moves to it and the change is versioned.
Price
€149 per vial, published
Retatrutide testing is €149 at the published rate — see its row in the price list. Add-ons: mass-spectrometry identity confirmation +€79 (adds 5–7 days), extended CoA data +€15, additional report +€29 (at order creation), rush +50%, additional vial of the same lot −30%.
On the certificate
What the CoA shows
- Measured quantity in duplicate, next to the label claim.
- Chromatographic purity with the full impurity table, not just the headline figure.
- The identity basis, stated: retention-time (presumptive) or mass-spectral (confirmed).
- Method reference and version, so the numbers can be interrogated.
- A task ID and QR code, so anyone can verify the report.
New to certificates? Read how to read a peptide CoA and how to verify one.
FAQ
Retatrutide testing questions
Why does the retatrutide CoA say “characterized in-house standard”?
Because no pharmacopoeial reference standard exists for retatrutide yet. The laboratory characterizes its own reference lot by mass spectrometry and mass balance, states that on the certificate, and versions the method the day an official standard becomes available.
How much does Retatrutide testing cost?
€149 per vial at the published rate: chromatographic purity plus duplicate quantification in mg per vial, with a verifiable report. Mass-spectrometry identity confirmation is +€79, extended CoA data +€15, and an additional report +€29 at order creation.
How long does Retatrutide testing take?
The target turnaround is 48–72 hours from sample receipt. A rush option at +50% moves the sample to the front of the queue; the mass-spectrometry add-on adds 5–7 days.
Same category
Also tested in GLP-1 & metabolic
Semaglutide · Tirzepatide · Cagrilintide · Liraglutide · Survodutide — or see the full price list.
Iberian Analytical opens in Q1 2027 — from €99 per test, 48–72 h target, and every report verifiable. Nothing is sold on this site today. Leave an email and we will write once, when the laboratory starts issuing certificates.
Testing for a business? Apply for an associate account — a 24-month rate lock and priority scheduling.