In the last two decades, many new peptides have been developed, and new knowledge on\nhow peptides improve the skin has been uncovered. The spectrum of peptides in the field of cosmetics\nis continuously growing. This review summarizes some of the effective data on cosmeceutical\npeptides that work against intrinsic and extrinsic aging. Some peptides have been proven in their\nefficacy through clinical skin trials. Well-known and documented peptides like copper tripeptide\nare still under research to obtain more details on their effectiveness, and for the development of\nnew treatments. Palmitoyl pentapeptide-4 and Carnosine are other well-researched cosmeceuticals.\nAdditionally, there are many more peptides that are used in cosmetics. However, study results for\nsome are sparse, or have not been published in scientific journals. This article summarizes topical\npeptides with proven efficacy in controlled in vivo studies.
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