Research examining muscle hypertrophy has consistently shown that major increases in muscle mass need at least 4 weeks of use, with continued increases through 6-8 weeks
He Y, Sun MM, Zhang GG, Yang J, Chen KS, Xu WW, Li B (2021) Targeting PI3K/AKT signal transduction for cancer therapy
Variants in FTO (fat-mass and obesity-associated), GLP1R (the GLP-1 receptor these compounds target), MC4R (satiety and energy balance), and TCF7L2 (glucose homeostasis) outline your baseline metabolic terrain
Every peptide has a biological ceiling determined by receptor dynamics, and IGF-1 LR3 reaches that ceiling faster than most because of its extended half-life and high bioavailability
This is known as insulin resistance