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Research4 min readUpdated May 2026

IGF-1 LR3: a research overview

IGF-1 LR3 is an engineered analogue of insulin-like growth factor 1 studied in cellular-growth research. This overview covers its structure and handling, with no therapeutic or dosing claims.

What it is

IGF-1 LR3 (Long R3 IGF-1) is an 83-amino-acid analogue of insulin-like growth factor 1, modified so it binds less tightly to IGF-binding proteins than the native molecule. That change is why the analogue is used in research.

Why it is studied

IGF-1 LR3 appears in preclinical and in-vitro cell-growth literature as a research tool. The conclusions belong to those studies; nothing here is a statement about human effects.

Handling notes

  • Supplied lyophilised; reconstitute gently without shaking.
  • Keep the dry solid sealed, cold and dark.
  • Refrigerate after reconstitution and aliquot to avoid freeze-thaw cycles.

For in-vitro research use only. Not for human or veterinary use.

Mentioned in the catalog
For in-vitro research use only. This guide covers general laboratory handling and is not medical, clinical or dosing advice.