A synthetic, modified version of insulin-like growth factor-1 is known as IGF-1 LR3 (insulin-like growth factor-1 long arginine 3). IGF-1 LR3 remains active up to 120 times longer than conventional IGF-1 due to the fact that it does not attach to IGF-1 binding proteins very well. As a result, the peptide’s half-life is improved, increasing its activity.IGF-1 LR3 improves muscle repair and hypertrophy, fat metabolism, and cell division and growth. According to recent studies, IGF-1 LR3 may also help mothers of small children who are breastfeeding.
Although there is currently no clinical evidence describing its half-life in the human body, frequent internet myths that it can last up to 20–30 hours longer than IGF-1 appear to be unfounded. Athletes and bodybuilders use the peptide similarly because it is an analogue of IGF-1, primarily by injecting it subcutaneously once or twice a day.