Buy 2, save 5%Buy 3+, save 9%Buy 6+, save 15%Buy 10+, save 22%Free EU & Balkan shipping over €1503rd-party tested batchesTest results available through the libraryCzech Republic fulfillmentResearch use onlyBuy 2, save 5%Buy 3+, save 9%Buy 6+, save 15%Buy 10+, save 22%Free EU & Balkan shipping over €1503rd-party tested batchesTest results available through the libraryCzech Republic fulfillmentResearch use only
Lyophilized form helps protect peptide quality. Peptides are supplied as a dry powder, which may look like a compact "puck" or a lighter powder inside the vial.
Because the peptide is dry, it does not require refrigerated shipping during normal transit, including warm seasonal conditions. For longer storage, follow the storage guidance in the product description.
Appearance can vary. The stated peptide content is checked through third-party analysis.
Read more in the product description.
Solution not bundled
Peptides are delivered as lyophilized powder. This dry form helps preserve peptide quality during storage and transport and does not require refrigerated shipping during normal transit.
To prepare a solution, use a solvent such as Bacteriostatic water. It is sold separately, so add it only when you need it for peptide preparation.
Read more in the product description.
Metabolic peptide
GLP-3 (RT)
Low stock
GLP-3 is Adria Science's catalogue name for retatrutide. This synthetic peptide is studied at GIP, GLP-1, and glucagon receptors.
MassQuantity
168,50 €168,50 €
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GLP-3 (RT) · 1 vial1168,50 €168,50 €
GLP-3 (RT)
77,90 €–168,50 €Price range: 77,90 € through 168,50 €
Triple incretin analogue for GLP-1, GIP, and glucagon receptor pathway studies.
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Research overview
GLP-3 (RT)
Retatrutide, also called LY3437943, is one engineered peptide that can signal through three receptor pathways. Its design is different from a blend of separate peptides.
Studies measure receptor activity, glucose-related signals, fat-tissue endpoints, and liver models. These controlled findings do not promise a result for the supplied material.
Triple-receptor pharmacology
Studies measure activity at GIP, GLP-1, and glucagon receptors. They also examine sequence design and albumin binding.
The three pathways are not interchangeable. Comparisons must use the exact assay and activity values from the original study.
Metabolic and liver models
Published work also covers glucose, lipid, energy-balance, and liver-related measurements. These findings do not replace lot-specific analytical testing.
Soluble in bacteriostatic water and suitable aqueous laboratory solvents.
Product note
GLP-3 research compound; supplied strictly for research use only.
Laboratory care
Handling
Peptides in transport
Peptides in lyophilized form are supplied in glass vials by standard shipping methods and do not require refrigeration. Short-term temperature fluctuations during transport will not reduce their quality and efficacy. Even at high summer temperatures, the peptides in lyophilized form are stable for several weeks.
Storage of lyophilized peptides
Lyophilized peptides should be stored in a dry place, protected from light and moisture. The following storage conditions are generally recommended:
Room temperature (15–25 °C): Up to 3 months
Refrigerated (2–8 °C): Up to 6 months
Frozen (-20 °C or below): 3–5 years (recommended for long-term storage)
Allow the vial to reach room temperature after taking it out of the refrigerator or freezer.
Storage of reconstituted peptides
Once reconstituted, peptide solutions are generally less stable than their lyophilized form and should be stored under refrigerated conditions whenever possible.
The following storage conditions are generally recommended:
Room temperature (15–25 °C): Avoid prolonged storage
Refrigerated (2–8 °C): Typically 4–8 weeks
Frozen (-20 °C or below): Up to 3–4 months
To preserve peptide integrity, avoid repeated freeze–thaw cycles, as these may accelerate peptide degradation.
Important: Most manufacturers recommend discarding reconstituted peptides within 4 weeks when stored at 2–8 °C. This recommendation is intentionally conservative and may not reflect the actual chemical stability of every peptide. In our own stability studies, many peptides reconstituted in bacteriostatic water showed no detectable degradation after 12 weeks of refrigerated storage. As peptide stability is highly sequence- and formulation-dependent, this result should not be extrapolated to all peptides without supporting stability data.
Analytical documentation
Latest test results
Latest published result
Liquilabs s.r.o.Signed Certificate of Analysis · 10mg
99.4%Purity by HPLC
Batch number
1731702
Tested
2026-07-27
Recorded QC panel
AssayPeptide screening
9.78 mg
PurityPeptide screening
99.4%
Identity (FTIR)FTIR spectrum
994
Identity (RT)Retention time
0.995
Bacterial EndotoxinUSP / Eur. Ph. 2.6.14
0.082 EU/mg
Molecular Ion MassMS deconvolution
4731 Da
These are the latest published results for this strength. The batch number is printed on each vial. Your supplied batch is confirmed against the matching published record when your order is allocated.
Latest published result
Liquilabs s.r.o.Signed Certificate of Analysis · 20mg
99.4%Purity by HPLC
Batch number
5830628
Tested
2026-07-27
Recorded QC panel
AssayPeptide screening
18.87 mg
PurityPeptide screening
99.4%
Identity (FTIR)FTIR spectrum
994
Identity (RT)Retention time
0.996
Bacterial EndotoxinUSP / Eur. Ph. 2.6.14
0.015 EU/mg
Molecular Ion MassMS deconvolution
4731 Da
These are the latest published results for this strength. The batch number is printed on each vial. Your supplied batch is confirmed against the matching published record when your order is allocated.
Latest published result
Liquilabs s.r.o.Signed Certificate of Analysis · 30mg
99.8%Purity by HPLC
Batch number
3908019
Tested
2026-07-27
Recorded QC panel
AssayPeptide screening
30.0 mg
PurityPeptide screening
99.8%
Identity (FTIR)FTIR spectrum
994
Identity (RT)Retention time
0.996
Bacterial EndotoxinUSP / Eur. Ph. 2.6.14
0.008 EU/mg
Molecular Ion MassMS deconvolution
4731 Da
These are the latest published results for this strength. The batch number is printed on each vial. Your supplied batch is confirmed against the matching published record when your order is allocated.
Abdrabou Abouelmagd A, Abdelrehim AM, Bashir MN, Abdelsalam F, Marey A, Tanas Y, Abuklish DM, Belal MM · 2025
Efficacy and safety of retatrutide, a novel GLP-1, GIP, and glucagon receptor agonist for obesity treatment: a systematic review and meta-analysis of randomized controlled trials
Proceedings (Baylor University. Medical Center) ·
View source ↗
· 2025
Retatrutide (LY3437943): A Novel Tri-agonist Peptide for Metabolic Disease Treatment
2025 ·
Alaa Abdrabou Abouelmagd et al. · 2025
Efficacy and safety of retatrutide, a novel GLP-1, GIP, and GCG receptor agonist for obesity treatment: a systematic review and meta-analysis of randomized controlled trials
Rosenstock J, Frias J, Jastreboff AM, et al. Retatrutide, a GIP, GLP-1 and GCG receptor agonist, for people with type 2 diabetes: a randomised, double-blind, placebo and active-controlled, parallel-group, phase 2 trial conducted in the USA. Lancet. 2023;402(10401):529–544. doi: 10.1016/S0140-6736(23)01053-X. [DOI] [PubMed]
Urva S, Coskun T, Loh MT, et al. LY3437943, a novel triple GIP, GLP-1, and GCG receptor agonist in people with type 2 diabetes: a phase 1b, multicentre, double-blind, placebo-controlled, randomised, multiple-ascending dose trial. Lancet. 2022;400(10366):1869–1881. doi: 10.1016/S0140-6736(22)02033-5. [DOI] [PubMed]
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