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They provide a much higher dose than the injectable compound
IGF-1 LR3, by contrast, works through the classic IGF-1 receptor signaling cascade, activating the PI3K/Akt/mTOR pathway and supporting satellite cells once they have already entered the proliferative and differentiation phase
For instance, a clinical trial of 11,000 people found that using GLP-1 RAs reduced kidney disease progression by 18%, kidney failure by 16% and risk of cardiac events by 13%
And that one involved only 12 people, who received peptide injection for knee pain
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![Tirzepatide vs. Semaglutide: Which GLP-1 Better Preserves Muscle? [SURMOUNT-5 Data]](https://www.clinicalnutritioncenter.com/wp-content/uploads/2026/04/research-image-2026-04-10-1024x559.jpg)
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