Insulin Like Growth Factor 1 (IGF 1) and Its Monitoring in Medical Diagnostic and in Sports Clinical Review Mecasermin (Increlex) NCBI Bookshelf IGF 1 LR3 for Fetal Growth Restriction Children's Hospital Colorado Igf 1 LR 3 Enhanced Pharmaceuticals IGF 1 LR3 is a powerful growth factor that helps build muscle, burn fat, and speed up recovery. It works by boosting protein synthesis, which helps muscles grow and heal faster. It also INCRELEX (mecasermin) for Severe IGF 1 Deficiency