IGF-1 LR3 for Muscle Growth

IGF-1 LR3 is a modified, long-acting version of Insulin-like Growth Factor-1, a hormone that mediates many of the effects of Growth Hormone (GH). While GH signals the liver to produce IGF-1, this peptide can be administered directly. The "LR3" modification extends its half-life significantly, allowing it to remain active in the body for much longer. Its primary effect is to stimulate both muscle hypertrophy (growth of existing muscle cells) and, uniquely, muscle hyperplasia (the creation of new muscle cells). This ability to create new muscle fibers is what makes it one of the most potent anabolic peptides available. From a biological age perspective, combating the age-related loss of muscle tissue (sarcopenia) is paramount. By promoting the growth of new, functional muscle, IGF-1 LR3 can have a profound impact on metabolic health, strength, and physical resilience. However, it is a powerful growth-promoter and carries risks, including potential impacts on insulin sensitivity and unwanted cell growth, requiring very careful use under expert supervision.