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Topical peptides function as signaling molecules that communicate with fibroblasts and keratinocytes, stimulating: Collagen synthesis (types I, III, and IV) Elastin production Barrier repair and hydration retention Melanogenesis regulation (relevant to hyperpigmentation research) Key peptide classes studied in dermatology include: Peptide Class Example Primary Function Signal Peptides Palmitoyl Pentapeptide-4 (Matrixyl) Stimulates collagen and elastin production

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They can increase bloating and discomfort when digestion is already slowed

19 Gonzalez-MalervaL.ParkJ.ZouL.HuY.MoradpourZ.PearlbergJ.et al (2011)

That is an important caveat