Peptides have become a growing focus in modern cellular and dermatological research due to their role as short chains of amino acids that can influence biological signaling pathways. Within the field of skin science, several peptides are being investigated for their potential impact on cellular regeneration, extracellular matrix dynamics, and overall skin physiology. These studies aim to better understand how peptide signaling may contribute to processes such as collagen synthesis, cellular communication, and tissue maintenance. One of the most widely studied molecules in this area is GHK-Cu, a naturally occurring copper-binding peptide that has drawn scientific interest for its involvement in cellular repair pathways and gene expression related to tissue remodeling. Research suggests that this peptide may influence pathways associated with collagen production, antioxidant activity, and skin cell renewal, making it a key molecule in experimental dermatological models.