Collagen synthesis and skin thickness benefit most from IGF-1 LR3 (sustained fibroblast stimulation) and GH secretagogue protocols (Ipamorelin or GHRP-2 increasing GH, which then drives hepatic IGF-1 production)
Activity & rest: Pair appropriate training with real recovery time and avoid overtraining
Women often report particularly noticeable improvements in skin quality, sleep, and body composition
(2) Alba M, Fintini D, Sagazio A, Lawrence B, et al
IGF-1 LR3 is used in muscle-focused research to probe possible interactions with this pathway: Myostatin Counter-Regulation: In preclinical models, IGF-1type signaling has been reported to counteract some myostatin-associated effects on muscle cells, supporting investigations into how anabolic and anti-catabolic signals intersect