Is IGF-1 LR3 legal in the US?
No. It is not approved and is sold as a research chemical.
CAnimal and cell studiesNot approvedas of 2026-10-26
IGF-1 LR3 is not approved by the FDA for any use. It is manufactured as a cell-culture reagent and sold online as a research chemical. 3
No. It is a laboratory reagent with no approved medical use. The approved IGF-1 drug is mecasermin. It is a different product, made for children with severe IGF-1 deficiency. 3
More on IGF-1 LR3
Citations
- Hakuno and Takahashi 2018, Journal of Molecular Endocrinology: IGF1 receptor signaling pathways pubmed.ncbi.nlm.nih.gov
- Scientific Reports 2019: experimental study using IGF-1 LR3 doi.org
- Frontiers in Endocrinology 2026: review covering IGF-1 analogs doi.org
Reference information only, not medical advice. Drawn from the IGF-1 LR3 article, fact-checked against the cited sources. No dosing anywhere on this site.