IGF-1 LR3 has never been studied in human clinical trials for muscle or performance use and is not FDA-approved, so there is no validated human dose to report. It is documented mainly as a laboratory cell-culture reagent, not a therapeutic.[1][2]
Reviewed for accuracy · Last reviewed July 8, 2026There is no validated human dose. IGF-1 LR3 has never been through human trials for muscle or performance use, so no clinical dosing exists to report:
You will find microgram injection figures for IGF-1 LR3 quoted on forums and vendor pages. Those are anecdotal, not a clinical guideline, and we do not reproduce them as a titration table because doing so would imply a validated protocol that does not exist. The honest reading is that any human dose is uncharacterized.
It is worth repeating that IGF-1 LR3 is not the approved IGF-1 product. Mecasermin (recombinant human IGF-1) has an approved pediatric indication and dosing, but it is a different molecule for a different purpose, and its dosing does not transfer to the LR3 research chemical.
This page is an independent educational reference and is not medical advice, and does not indicate any approval status for any use. IGF-1 LR3 is a research chemical with no human trials. Talk to a doctor before considering any compound.