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Recombinant IGF-1 analog, sold for laboratory research.
Identity
IGF-1 LR3 is a lab-engineered version of insulin-like growth factor 1, a hormone the body already produces, with a small chemical change near one end that makes it stick around in the bloodstream longer than the natural version and bind less to certain carrier proteins. It was originally built as a research tool for scientists studying how IGF-1 works, not as something meant for people. Think of it as the body's own growth signal, re-engineered to keep broadcasting for longer.
IGF-1 LR3 is a recombinant igf-1 analog of 83 amino acid residues. SBz Industries sells it for laboratory research.
Research
In plain terms, with a link to every study. The most useful thing to notice is what each study was done in.
Research on this specific modified molecule sits almost entirely in animals and cell cultures, mostly from agricultural and veterinary science rather than human medicine. Cattle studies have looked at its effect on whole-body protein levels, and cell culture studies have used it to study how muscle precursor cells grow and mature. No published human trial on IGF-1 LR3 itself turned up in this search.
cattle1999
Researchers gave IGF-1 LR3 by IV infusion to heifers that were slowly losing weight on a restricted diet, then measured blood levels of amino acids, glucose, and other growth factors, finding the treated group tended to hold onto more whole-body and muscle protein than untreated animals.
Action of long(R3)-insulin-like growth factor-1 on protein metabolism in beef heifers.
Hill and colleagues, Domestic Animal Endocrinology
cells2004
Scientists grew a rat muscle precursor cell line in a dish and exposed it to IGF-1 LR3 alongside a natural binding protein called IGFBP-3, measuring cell growth and maturation, and found the binding protein blocked IGF-1 LR3's growth-stimulating effect on the cells but not its effect on how they matured.
Effect of recombinant porcine IGFBP-3 on IGF-I and long-R3-IGF-I-stimulated proliferation and differentiation of L6 myogenic cells.
Xi and colleagues, Journal of Cellular Physiology
Each study links to its record on PubMed, the US National Library of Medicine database. Checked 25 September 2026.
Handling
Lyophilized: -20C, protected from light. Reconstituted: 2-8C.
Give the vial twenty minutes on the bench before opening it, so water does not condense onto the powder.
Slowly, down the inside wall of the vial, never straight onto the powder.
Leave it alone until it clears. Do not shake it. Shaking damages the peptide.
Once mixed, it breaks down much faster than the dry powder. Keep it cold and dark.
Documentation
An independent lab tests every compound we sell. It confirms the compound is what the label says and measures purity by HPLC.
The latest certificate is on the product page, so you can read the result before you order.
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Questions
IGF-1 LR3 is a lab-engineered version of insulin-like growth factor 1, a hormone the body already produces, with a small chemical change near one end that makes it stick around in the bloodstream longer than the natural version and bind less to certain carrier proteins. It was originally built as a research tool for scientists studying how IGF-1 works, not as something meant for people. Think of it as the body's own growth signal, re-engineered to keep broadcasting for longer. SBz Industries sells it for laboratory research only.
Not in any published study found here. The available research is in cattle and in rat muscle cell cultures.
It has a small structural change that makes it stay active in the bloodstream longer and bind less to natural carrier proteins that would otherwise inactivate it quickly.
IGF-1 LR3 ships as a freeze-dried powder. Mix it with bacteriostatic water, added slowly down the inside wall of the vial, and let it dissolve without shaking. The researcher decides the working concentration, not us, and we publish no protocols.
Lyophilized: -20C, protected from light. Reconstituted: 2-8C. Vials ship in plain outer packaging with no product name on the outside.
Yes. An independent lab tests every compound: it confirms the compound is what the label says and measures purity by HPLC. The latest certificate is on the product page, and you can read it before you order.
Researchers and institutions, 21 or over. By ordering you confirm the material is for laboratory research and will not be used in humans or animals.
Order
Every compound is third-party tested, with the certificate on its product page. Every order ships in plain packaging.