Is a Certificate of Analysis available for GLP-3 (RT)?

Yes. Batches are independently verified by reverse-phase HPLC. The Certificate of Analysis is batch-matched to the vial label and published in the public COA library at alphex.co.uk/pages/coa, where you can read it before you order.

How should it be stored on arrival?

Lyophilised peptides ship vacuum-sealed. Refrigerate at 2 to 8 C for short-term storage and freeze at minus 20 C for long-term storage. Keep light-sensitive compounds in the original vial.

What is it supplied for?

Supplied exclusively for laboratory and in-vitro research purposes by qualified researchers. Not authorised for human or veterinary use.

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GLP-3 (RT)

Q: How is it shipped and how quickly?

Order by 2pm Monday to Friday for same-day dispatch from UK domestic stock. Sent with Royal Mail Tracked 24, which aims for the next working day, in vacuum-sealed, discreet packaging. 3.99 GBP under 60 GBP, free over 60 GBP after any discount.

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Current batch verified

>99.80% ± 0.18% purity, Vanguard Laboratory, 3 August 2026. See the certificate →

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Independently verified purity

>99.80%

Chromatographic purity, >99.80% ± 0.18%

Measured by HPLC-UV/VIS at Vanguard Laboratory on the exact batch we ship you, not a representative sample from a previous lot.

Batch on the vial#0013-RETA

Certificate lot0013-B

Vial size certified30 mg

LaboratoryVanguard Laboratory, Olympia WA

Laboratory IDV260728-13 001

Date reported3 August 2026

Chromatographic purity by HPLC, full chromatogram on the certificate

Batch number on the certificate matches the number on your vial

Published in full before you buy, 6 certificates on record for this compound

Read this batch's certificate

Vanguard Laboratory is accredited to ISO/IEC 17025:2017 by A2LA under certificate scope 6377.01. The chromatographic purity result shown is not represented as an accredited-scope test. The laboratory did not observe sample selection and cannot confirm the sample is representative of the whole lot.

Certificate of Analysis

Every batch is independently verified by reverse-phase HPLC to 99+% purity by Vanguard Laboratory. The certificate is batch-matched to the vial label and published in our COA library, so you can read it before you order rather than asking for it.

Vanguard is accredited to ISO/IEC 17025:2017 by A2LA under certificate scope 6377.01. The chromatographic purity result is not represented as an accredited-scope test.

Shipping & delivery

Order by 2pm Mon-Fri for same-day dispatch. Sent with Royal Mail Tracked 24, which aims for the next working day. Vacuum-sealed, discreet packaging. £3.99 under £60, free over £60 after any discount.

Free delivery protection is included on every order. If your parcel is lost in transit or a vial arrives damaged, we replace it at no cost. See shipping and delivery.

Storage & handling

Lyophilised peptides ship vacuum-sealed. Refrigerate (2-8°C) on arrival for short-term storage, freeze (-20°C) for long-term.

Research use only

Supplied exclusively for laboratory and research purposes. Not authorised for human or veterinary use.

GLP-3 - Research Peptide

For research purposes only. This product is supplied exclusively for scientific laboratory research and analytical applications. It is not intended for human or animal use, and must not be misused in any way that contravenes regulations or applicable laws.

Product Overview GLP-3 is a novel investigational tri-agonist peptide that targets the glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP), and glucagon receptors. It is supplied strictly for in-vitro and in-vivo animal research to study metabolic regulation and receptor affinity.

Technical Specifications:

Chemical Name: Retatrutide (LY-3437943)
Molecular Formula: C221H342N56O68
Molecular Weight: ~4731.33 g/mol
CAS Number: 2381089-83-2
Class: Triple Receptor Agonist (GLP-1, GIP, GCGR)
Purity: ≥99.0% (HPLC Verified)
Appearance: White lyophilized powder.

Storage & Handling: Extremely sensitive to heat and agitation. Store strictly in a refrigerated environment. Reconstitute gently by allowing water to run down the side of the vial; do not shake.

GLP-3 (RT) specification

Compound class	Synthetic lipidated peptide, GIP/GLP-1/glucagon receptor ligand (in-vitro research)
Sequence	39-residue lipidated peptide (LY3437943); full sequence on COA
Molecular formula	C221H342N46O68
Molecular weight	4731.3 g/mol
CAS number	2381089-83-2
Also known as	Retatrutide, LY3437943, GLP-3 (RT)
Form	Lyophilised powder, vacuum-sealed glass vial
Purity and identity	99+% by RP-HPLC (220 nm)
Available sizes	5mg, 10mg, 20mg, 30mg
Storage	Sealed vial: -20 C long term, 2-8 C short term. Protect from light and moisture.
Documentation	Batch-matched Certificate of Analysis with the HPLC chromatogram, the measured purity and the issuing laboratory named. Published in the public COA library, searchable by the batch code printed on the vial label.
Origin and dispatch	UK domestic stock. Same-day dispatch before 2pm Mon-Fri, sent with Royal Mail Tracked 24.
Intended use	Laboratory and in-vitro research only. Not authorised for human or veterinary use.

Values are typical for the compound. The Certificate of Analysis for the shipped batch is the authoritative record for purity, identity and net content.