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Thymosin beta-4derived peptides such as TB-500 are widely investigated in wound-healing research because actin-mediated cellular migration is essential for epithelial repair, fibroblast movement, and structural reorganization of damaged tissue

Rumack BH, Bateman DN

doi: 10.1016/j.ultrasmedbio.2018.11.010 163 TofarisG

DSIP does not appear on the current WADA Prohibited List

Retinol is an over-the-counter vitamin-A derivative that the skin must convert into retinoic acid (the active form) over multiple steps

It stimulates collagen and glycosaminoglycan synthesis in skin fibroblasts, supports blood vessel growth, and serves as a feedback signal generated after tissue injury