Royal Peptides products are offered exclusively for laboratory research, analytical, and scientific applications. Not for human or veterinary use.
01Research Product Information
Royal Peptides supplies compounds intended for controlled laboratory research and analytical applications.
- For research and analytical use only
- Not intended for human consumption or administration
- Not intended for veterinary use
- Not represented as a drug, medicine, or therapeutic product
- Laboratory researchers are responsible for appropriate protocols and controls
02Lyophilized Product Format
Where applicable, Royal Peptides research materials are supplied in lyophilized form.
Lyophilization is a freeze-drying process used to remove moisture from material under controlled conditions.
- Material appearance may differ between compounds and production lots
- Lyophilized material may appear as a cake, film, or fragmented material
- The quantity of visible material may appear small relative to vial size
- Visual appearance alone does not establish identity or purity
03Storage & Laboratory Handling
Storage requirements may vary by compound, formulation, and production lot. Refer to the product label and available product-specific documentation.
- Protect research materials from excessive heat
- Limit unnecessary exposure to direct light and moisture
- Keep containers securely closed when stored
- Follow product-specific temperature requirements when provided
- Use appropriate laboratory contamination-control procedures
04Packaging & Quality Documentation
Packaging components may vary slightly between production lots. This can include vial closures, cap styles, label positioning, and external packaging.
- Check the product label and lot identifier before laboratory use
- Inspect the vial and closure for visible shipping damage
- Packaging design may differ between batches
- Lot-specific analytical documentation may be available in our COA library
Retatrutide + Eloralintide Research Blend- Loretta
Retatrutide Eloralintide – Loretta™ 12.5mg — Retatrutide + Eloralintide Research Blend
Retatrutide Eloralintide is available to order online from Royal Peptides – Loretta Research Blend Kit. Loretta pairs a triple incretin agonist with an amylin analogue, two pathways researchers usually have to source and combine separately. Compare it with the standalone eloralintide profile, or compare the pathways in our reta peptide vs tirzepatide guide.
Loretta™ 12.5mg is an exclusive Royal Peptides premium research blend combining Retatrutide 10mg with Eloralintide 2.5mg in a single lyophilized research formulation. The blend is designed for advanced laboratory investigation of two distinct metabolic signaling compounds within one defined research material.
Research Use Only
Not for human or veterinary use, administration, ingestion, injection, compounding, diagnostic, therapeutic, clinical, or personal use.

Order Online
Buy Retatrutide Eloralintide Online
Pick your strength with the selector at the top of this page and add Retatrutide Eloralintide to your cart. Prices are per vial or per kit as shown, and every order ships with lot documentation.
Need larger quantities of Retatrutide + Eloralintide? Kits and wholesale boxes lower the unit price; see our american wholesale peptides options.
01
Loretta™ 12.5mg — Retatrutide + Eloralintide Research Blend
02
What Is Loretta™ 12.5mg?
Loretta™ is Royal Peptides’ proprietary name for a dual-compound research formulation containing 10mg Retatrutide and 2.5mg Eloralintide, providing 12.5mg total research material per vial.
The formulation brings together two structurally and mechanistically distinct investigational compounds that have attracted substantial interest in modern metabolic research.
Retatrutide has been investigated as a GLP-1, GIP and glucagon receptor agonist, while Eloralintide is being investigated through a different signaling system involving the amylin receptor family.
Combining these compounds creates a defined laboratory material for researchers interested in studying the interaction of incretin, glucagon and amylin-associated signaling pathways within experimental models.
Important Research Distinction Loretta™ is a Royal Peptides research blend. The individual components have been investigated independently, but the Loretta™ combination should not be interpreted as an established clinical therapy or as having demonstrated clinical efficacy as a combination.
03
Loretta™ Blend Composition
Each Loretta™ research vial contains a defined 4:1 ratio of Retatrutide to Eloralintide by stated mass.
04
Research Component 01
Retatrutide 10mg
Retatrutide, also identified in the scientific literature as LY3437943, is an investigational peptide engineered to interact with three metabolically relevant receptor systems: GLP-1, GIP and glucagon receptors.
This multi-receptor pharmacology has made Retatrutide an important research compound for investigating integrated metabolic signaling rather than a single isolated receptor pathway.
Experimental and clinical research has examined Retatrutide in relation to areas including energy-balance signaling, glucose-associated pathways, lipid metabolism and metabolic regulation.
GLP-1 Receptor Investigated in incretin and metabolic signaling research. GIP Receptor Provides an additional incretin-associated signaling pathway. Glucagon Receptor Adds a distinct pathway relevant to energy and metabolic research.
05
Research Component 02
Eloralintide 2.5mg
Eloralintide, also known by the development identifier LY3841136, is an investigational long-acting amylin receptor agonist being studied as a distinct approach to metabolic signaling research.
Amylin is a peptide hormone associated with pancreatic beta-cell biology and participates in signaling systems involved in nutrient and energy regulation.
Eloralintide is therefore scientifically distinct from the incretin/glucagon receptor pharmacology represented by Retatrutide. This difference is central to the research rationale behind examining the compounds together in a controlled laboratory environment.
Amylin Signaling Investigated through receptor pathways distinct from the incretin receptor family. Metabolic Research Studied in experimental and clinical metabolic research programs. Complementary Pathway Provides a mechanistically distinct research target alongside Retatrutide.
06
Why Study Retatrutide + Eloralintide?
The scientific interest in a Retatrutide and Eloralintide research blend comes from the fact that the two compounds engage different receptor systems.
Multi-Receptor Signaling
Retatrutide provides a research model involving GLP-1, GIP and glucagon receptor activity.
Amylin-Receptor Signaling
Eloralintide introduces a separate amylin-associated receptor pathway into the experimental model.
Loretta™ therefore provides researchers with a single defined formulation for investigating how these distinct signaling systems may interact in experimental settings.
Because combination-specific evidence may differ from evidence for either compound individually, findings involving Retatrutide alone or Eloralintide alone should not automatically be attributed to the Loretta™ blend.
07
Eloralintide
Multi-Pathway Metabolic Research
Contemporary metabolic research increasingly examines communication among multiple receptor systems rather than treating individual pathways as completely isolated mechanisms.
Loretta™ combines compounds associated with four major areas of receptor research:
GLP-1 Incretin-associated receptor signaling. GIP Glucose-dependent insulinotropic peptide signaling. Glucagon Energy and metabolic signaling research. Amylin Distinct peptide-hormone receptor research. Energy Balance Experimental investigation of integrated metabolic signaling. Pathway Interaction Laboratory investigation of multiple signaling systems within the same research model.
08
Loretta™ Research Areas
The Loretta™ formulation is intended for advanced laboratory investigation where researchers require both Retatrutide and Eloralintide within a defined research blend.
Receptor Signaling
Investigation of GLP-1, GIP, glucagon and amylin-associated receptor systems.
Metabolic Pathway Research
Experimental investigation of interconnected pathways associated with metabolic regulation.
Energy-Balance Research
Research examining signaling mechanisms associated with energy homeostasis and nutrient-response biology.
Combination Research
Controlled investigation of two mechanistically distinct compounds within a single experimental formulation.
09
Loretta™ 12.5mg Research Specifications
10
Royal Peptides Exclusive
Loretta™ Premium Research Blend
Loretta™ was developed as a distinct Royal Peptides research formulation rather than simply presenting the two compounds as unrelated research materials.
Each vial provides a clearly defined 10mg Retatrutide + 2.5mg Eloralintide composition, allowing researchers to work from a consistent 12.5mg combined formulation.
11
Loretta™ 12.5mg FAQ
What is Loretta™ 12.5mg?
Loretta™ is an exclusive Royal Peptides research blend containing 10mg Retatrutide and 2.5mg Eloralintide, for a total stated research content of 12.5mg.
What peptides are in Loretta™?
Loretta™ contains two investigational research compounds: Retatrutide 10mg and Eloralintide 2.5mg.
What is Retatrutide?
Retatrutide, also known as LY3437943, is an investigational peptide studied for activity involving GLP-1, GIP and glucagon receptor signaling.
What is Eloralintide?
Eloralintide, also known as LY3841136, is an investigational long-acting amylin receptor agonist being studied in metabolic research.
What is the ratio of Retatrutide to Eloralintide in Loretta™?
Loretta™ contains 10mg Retatrutide and 2.5mg Eloralintide, representing a 4:1 ratio by stated mass.
Is Loretta™ the same as Retatrutide?
No. Loretta™ is a dual-compound Royal Peptides research blend. Retatrutide is one component of the formulation, with Eloralintide serving as the second component.
Has the Loretta™ combination been clinically established?
Loretta™ is a research blend. Research involving either individual component should not be interpreted as evidence establishing the safety or efficacy of this specific combined formulation.
Is Loretta™ intended for human use?
No. Loretta™ is supplied strictly as research material and is not intended for human or veterinary use.
Quality Documentation
Retatrutide Eloralintide Lot Testing & COA
Every Retatrutide Eloralintide lot is independently tested before release; results are listed with our coas peptides. For background reading, see published Retatrutide + Eloralintide research on PubMed.
Related Research
Researchers Also Order
Compounds often studied alongside Retatrutide + Eloralintide:



Buying Questions
Buying Retatrutide Eloralintide
Where can I buy Retatrutide Eloralintide?
Order Retatrutide Eloralintide directly from Royal Peptides. Choose a format in the Buy section, check out securely and your order ships from U.S. stock with lot documentation.
How fast do orders ship?
Orders are dispatched from U.S. inventory, usually within one business day, with tracking.
Retatrutide + Eloralintide for Laboratory Research
Retatrutide Eloralintide is supplied for laboratory research use only. Not for human or veterinary use.
Specifications
Product information pulled directly from WooCommerce.
No published specifications for this research material.
COA / Testing
Review available analytical documentation for the applicable product and batch in the COA library.
View COA LibraryShipping & Storage
Shipping options and delivery estimates are shown at checkout. Refer to the product label for storage requirements.
Related Research Materials.




