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