IGF1-LR3, a modified version of insulin-like growth factor-1, has a longer half-life than standard IGF-1 because it does not bind to IGF-1 binding proteins well. It promotes cell division and growth, fat metabolism, muscle repair, and hypertrophy by inhibiting myostatin.
IGF-1 derivatives, including IGF1-LR3, stimulate cell division and proliferation in various tissues, but they do not promote cell enlargement. IGF1-LR3 also reduces blood sugar and insulin levels, making it a potential treatment for diabetes. It counteracts myostatin and promotes tissue repair and maintenance, making it a potential protective molecule against aging and various conditions.
Ongoing research is exploring its potential benefits in preventing dementia, muscle atrophy, and kidney disease.
The primary concern for peptide researchers today is product purity. Nord-sci guarantees our product purity by performing independent testing of our products and providing those certifications for our customers in our product descriptions.
THIS PRODUCT IS NOT INTENDED TO TREAT, CURE OR DIAGNOSE ANY CONDITION OR DISEASE AND IS NOT FOR HUMAN CONSUMPTION. ALL PRODUCTS OFFERED ARE INTENDED FOR LABORATORY RESEARCH USE ONLY.
All products are produced using lyophilization (freeze-drying), a preservation method that allows peptides to remain fully stable during shipping for approximately 3-4 months. Once a peptide has been reconstituted with bacteriostatic water, it must be refrigerated to maintain integrity. After reconstitution, peptides typically remain stable for up to 30 days when stored properly.
Lyophilization, also referred to as cryodesiccation, is a specialized dehydration process in which peptides are first frozen and then exposed to a low-pressure environment. This causes the water within the vial to transition directly from a solid to a vapor (sublimation), leaving behind a dry, crystalline white material known as a lyophilized peptide. In this powdered form, peptides may be safely stored at room temperature until they are ready to be reconstituted with bacteriostatic water.
After delivery, peptides should be protected from heat and light. If use is expected within the near future (whether days, weeks, or a few months) refrigerated storage below 4°C (39°F) is generally sufficient. Lyophilized peptides are commonly stable at room temperature for several weeks or longer, making short-term ambient storage acceptable when use is anticipated within that timeframe.
For extended storage, ranging from several months to multiple years, freezing is strongly recommended. Storage at -80°C (-112°F) offers optimal long-term stability and helps preserve peptide structure and quality over time.
For more detailed guidance on peptide handling and storage best practices, please refer to the resource below:
IGF1-LR3 is a modified insulin-like growth factor research peptide commonly used in controlled laboratory studies investigating IGF receptor signaling, downstream anabolic pathway activation, and tissue-level growth-factor biology. The “LR3” format is typically discussed in research contexts for its altered receptor-binding and kinetic profile versus native IGF-1, making it a frequently selected tool compound for protocol-driven IGF pathway exploration.
This product is supplied exclusively for laboratory research applications and is supported by third-party analytical testing documentation to help research teams maintain strong internal quality controls and reproducibility standards.
IGF-1 LR3 Research Peptide Specifications:
| Unit Size | 1 mg/vial |
| Unit Quantity | 1 vial |
| Purity (HPLC) | See lot-specific COA for verified purity and analytical methods |
| Identity Verification | See lot-specific COA for mass spectrometry confirmation and method details |
| Sequence / Molecular Data | See lot-specific COA for sequence confirmation references and molecular characterization |
| Appearance | Lyophilized Powder |
| Source | Chemical Synthesis |
| Storage Conditions | Store lyophilized IGF-1 LR3 at −20 °C or below, protected from light and moisture. Reconstituted solutions should be stored at 2–8 °C and used in accordance with institutional stability guidance and study requirements. |
| Research Use Only | Supplied exclusively for laboratory research use. Not for human consumption, clinical use, or veterinary applications. |
Insulin-like growth factor (IGF) signaling is a core pathway in cellular growth, differentiation, and nutrient-partitioning biology. In preclinical and in vitro research, IGF-related compounds are often used to study receptor-mediated signaling cascades (such as PI3K/AKT and MAPK pathway activity), changes in protein synthesis markers, and shifts in cell growth behavior under controlled stimulus conditions.
IGF-1 LR3 is frequently positioned as a practical laboratory tool because it is referenced in the literature as having an altered interaction profile compared to native IGF-1. In experimental design, researchers may use IGF-1 LR3 to create a consistent, measurable IGF-axis stimulus for pathway mapping, comparative receptor response testing, and tissue-specific signaling studies.
Important Research Notice: Nordsci peptides are supported by independent third-party analytical testing to validate identity and purity via methods such as HPLC and mass spectrometry. A Certificate of Analysis (COA) is available for each lot to support protocol files, QC workflows, and documentation requirements.
THIS PRODUCT IS INTENDED FOR LABORATORY RESEARCH USE ONLY. NOT FOR HUMAN CONSUMPTION. NOT INTENDED TO DIAGNOSE, TREAT, CURE, OR PREVENT ANY DISEASE OR CONDITION.
IGF-1 LR3 is commonly used in mechanistic research to evaluate IGF receptor activation and downstream signaling behavior. Studies frequently track pathway-level readouts such as phosphorylation markers, gene expression changes, and time-dependent signaling kinetics across cell lines or tissue samples.
In programs where growth-factor signaling is evaluated alongside GH-axis stimulation models, labs often benchmark IGF signaling tools against upstream secretagogue frameworks such as Sermorelin or CJC 1295 (without DAC) in separate arms to preserve interpretability.
In controlled models, investigators may include IGF-1 LR3 when studying cellular growth-response behavior under standardized nutrient conditions. Research endpoints can include protein synthesis markers, cellular hypertrophy signals, and comparative response curves between different stimulus intensities or exposure windows.
These models are typically designed with strict controls to separate signaling effects from confounders such as serum variability, baseline metabolic stress, or cell-cycle differences.
In animal and tissue models, IGF-axis signaling is often evaluated in the context of remodeling and recovery-adjacent biology. IGF-1 LR3 may be used as a signaling probe in studies tracking tissue adaptation markers, growth-factor-related transcription patterns, and structural pathway activity in response to controlled stressors or interventions.
Where tissue integrity and repair signaling are also being investigated, some labs evaluate related tool compounds (in separate arms) such as BPC 157 or Thymosin Beta 4 to isolate repair-pathway endpoints from growth-factor endpoints.
IGF-1 LR3 is frequently integrated into larger research programs as a comparator compound to help distinguish upstream endocrine stimulation from downstream IGF-axis signaling. In these designs, the goal is typically clarity: determining whether observed effects are best explained by GH release dynamics, receptor-level IGF stimulation, or downstream transcriptional shifts.
Standardized sourcing and lot-level COAs reduce variability when you are running multi-arm signaling studies and comparing cohorts over time.
Shop all peptidesEach lot of IGF-1 LR3 is supported by a Certificate of Analysis documenting identity and analytical characterization. COA documentation can be used for protocol files, internal QC review, or procurement documentation where research teams require traceable inputs for multi-phase study execution.
Sourcing IGF-1 LR3 for institutional use requires a supplier with robust documentation, consistent labeling, and repeatable quality controls. Nordsci Peptides focuses on research-grade peptides supported by third-party testing and lot traceability, enabling labs to execute protocol-driven research with reliable inputs.
IMPORTANT: IGF-1 LR3 is sold exclusively for in vitro and preclinical research applications. It is not approved for human use or any therapeutic purpose. Researchers are responsible for complying with all applicable regulations and institutional policies governing peptide research in their jurisdiction.
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