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Found naturally in the human body's tissues and fluids, GHK serves as a signaling peptide that plays a role in tissue repair and regeneration

The released iron can be utilized for cellular processes, stored in the labile iron pool (LIP), or exported to the extracellular space via ferroportin (FPN), the only known mammalian iron exporter ( 2 + levels can trigger the Fenton reaction, in which Fe 2 + reacts with hydrogen peroxide to generate highly reactive hydroxyl radicals, leading to the accumulation of reactive oxygen species (ROS) and enhanced lipid peroxidation (Figure 1)

Citrulline malate increases NO production and decreases muscle soreness

Furthermore, IGF-1R signaling could be mediated through several proteins such as JNK, Jak1, Jak2, focal adhesion kinase, and TIMP2 (40)

FGFs, especially FGF-18, act through tyrosine kinase receptors (FGFRs) to initiate downstream RASRAFMEKERK signaling, thereby enhancing MSC proliferation and early chondrocyte expansion