IGF-1 FAQ: Your Questions Answered
The questions below are the ones that come up specifically about IGF-1, rather than general peptide questions that apply to everything.
Overview
People ask how it differs from IGF-1 LR3, why it needs acidic liquid, and why its report should include a function test.
What IGF-1 actually is
The natural growth factor the body produces after growth hormone acts — a folded protein, not a simple peptide, studied for muscle and tissue signalling. This is the native form, different from the longer-acting LR3 version.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
IGF-1 — common questions
How is native IGF-1 different from IGF-1 LR3?
LR3 is an engineered analogue with an extension and a substitution that lower its affinity for IGF binding proteins, extending its active window. Native IGF-1 is the unmodified sequence and behaves as the body's own downstream messenger in research models.
Why does it need acidic solvent?
It is a folded protein with poor solubility at neutral pH. The standard approach is dilute acetic acid first, then dilution into the working buffer. Undissolved material in plain water is expected chemistry, not a faulty vial.
Why does its COA need a bioassay?
Because a folded protein can lose its shape while its mass and chemical purity stay identical. Only a functional or bioidentity test confirms the fold survived.
Why is single-use aliquoting emphasised?
Freeze-thaw denatures the fold irreversibly. Splitting into single-use portions on first reconstitution avoids repeatedly stressing the same material.
What IGF-1 is studied for
Studied as the native ligand for the IGF-1 receptor and its downstream proliferation and survival pathways.
Examined in muscle research models for its role in satellite-cell behaviour and anabolic signalling.
Compared with IGF-1 LR3, whose reduced binding-protein affinity gives a longer active window — a contrast studied directly in the literature.
Summarizes published preclinical literature. Provided for research reference only; not a claim of efficacy or a description of human use.
More IGF-1 reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
Which solvents work, why, and what abnormal dissolution behaviour indicates.
The specific chemical routes by which this molecule breaks down, and how to limit each.
Which assays are informative for this molecule, and what to actually check on its COA.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
FAQ reference for other compounds
IGF-1 is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.