IGF-1 LR3
IGF-1 LR3 – Receptor Grade (Insulin-like Growth Factor-1 Long Arg³) is a synthetic analog of native IGF-1 engineered with two key modifications—a 13–amino-acid N-terminal extension and an arginine substitution at position 3—that extend its half-life and reduce its affinity for IGF-binding proteins in vitro. These structural changes make IGF-1 LR3 a preferred tool in pre-clinical research focused on cell growth, protein synthesis, and anabolic signaling. Scientists use the peptide in non-human and cell-culture models to examine pathways driving muscle hypertrophy, myoblast differentiation, glucose uptake, and tissue-repair kinetics, as well as to map cross-talk between the GH/IGF-1 axis and metabolic regulators.
Lifestyle Peptides supplies IGF-1 LR3 as a sterile, lyophilized powder that meets or exceeds 99 % purity, verified by HPLC and mass spectrometry and is RECEPTOR GRADE. Each batch is produced under GMP-aligned protocols and shipped with a Certificate of Analysis for full transparency. This compound is not approved for human or veterinary use and must be handled exclusively by qualified professionals in controlled laboratory environments. For researchers investigating sustained IGF-1 receptor activation, downstream Akt/mTOR signaling, or comparative studies against native IGF-1, IGF-1 LR3 offers a reliable, high-integrity option for advanced scientific inquiry.
FREQUENTLY ASKED QUESTIONS
What is IGF-1 LR3?
IGF-1 LR3 (Insulin-like Growth Factor-1 Long Arg³) is a synthetic analog of native IGF-1. It features a 13-amino-acid N-terminal extension plus an arginine substitution at position 3, modifications that markedly prolong half-life and reduce binding to IGF-binding proteins in laboratory models.
Why do researchers use IGF-1 LR3 instead of native IGF-1?
Because it binds less tightly to IGF-binding proteins and circulates longer, IGF-1 LR3 produces a more sustained activation of IGF-1 receptors in vitro and in animal studies. That extended window helps scientists probe downstream signalling—Akt/mTOR, protein-synthesis kinetics, and glucose-uptake pathways—without the rapid degradation seen with native IGF-1.
Do I need a prescription to purchase IGF-1 LR3?
A medical prescription is not required because the peptide is not sold for therapeutic use. However, Lifestyle Peptides restricts sales to qualified researchers, laboratories, and institutions that agree to our terms of sale affirming laboratory-research-only intent and compliance with all applicable regulations.
Which research areas commonly employ IGF-1 LR3?
Typical non-clinical applications include:
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Skeletal-muscle hypertrophy and myoblast differentiation models
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Akt/mTOR pathway mapping and protein-synthesis studies
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Glucose-uptake and insulin-sensitivity assays
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Comparative work on GH/IGF-1 axis regulation and tissue-repair kinetics
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