Described herein are compositions, methods, processes, kits and devices for the design, preparation, manufacture and/or formulation of modified mRNA (mmRNA) molecules encoding at least one cosmetic polypeptide of interest. The present invention provides a method of treating a disease, disorder and/or condition in a subject in need thereof by increasing the level of at least one cosmetic polypeptide of interest comprising administering to said subject an isolated polynucleotide selected from the group consisting of SEQ ID NOs 884-1611 and 5691-5707 comprising, a first region of linked nucleosides, said first region encoding the cosmetic polypeptide of interest, a first flanking region located at the 5' terminus of said first region comprising a sequence of linked nucleosides selected from the group consisting of the native 5' untranslated region (UTR).
