Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives TIRZEPATIDE Mechanism of action of tirzepatide GIP = glucose dependent insulinotropic polypeptide; GLP 1 = glucagon like peptide 1; LDL = low density lipoprotein; HR = heart rate. Noninvasive and Efficient Peptide Delivery by a Novel Biocompatible Ionic Liquid ACS Sustainable Chemistry & Engineering How GHK Peptide Works Signaling GHK acts as a switch for skin repair: Interacts with adenosine receptors reduces inflammation Activates MAPK ERK, PI3K Akt, TGF pathways Stimulates fibroblasts & keratinocytes boosts collagen, elastin