IGF‑1 LR3 stands for “Long Arginine-3 Insulin‑Like Growth Factor‑1.” It’s a laboratory-modified version of IGF‑1 designed to remain active longer and bind less to IGF-binding proteins.
People market it for:
Muscle growth and recovery
Increased protein synthesis
Improved nutrient uptake
Reduced recovery time
But the important part: IGF‑1 LR3 is not FDA-approved for bodybuilding or routine human use, and reliable human safety/dosing research is very limited. Most LR3 research is laboratory or animal-based.
More Info
A long-acting analog of insulin-like growth factor 1, studied in research for its role in muscle tissue growth and recovery.





Reviews
There are no reviews yet.