Research has revealed that NAD+ serves as a crucial substrate for several families of enzymes including sirtuins (longevity proteins), poly(ADP-ribose) polymerases (PARPs) involved in DNA repair, and CD38/CD157 enzymes that regulate cellular calcium signaling and immune function
Ma F, Yang L, Sun Z, Chen J, Rui X, Glass Z, et al
An anti-MITF small interfering RNA conjugated to a skin-penetrating peptide in a cream formulation was also successfully used for the treatment of patients with melasma, with an almost complete restoration of skin color on facial lesions after 12 weeks [110], but these agents need optimized topical delivery systems [111]
Lunghi C, Moisan J, Grgoire J-P, Gunette L
The TB-500 component thymosin -4 is prohibited at all times under section S2 of the WADA Prohibited List (peptide hormones, growth factors, related substances and mimetics), which expressly names thymosin--4 and its derivatives