However, vitamin C levels in skin are influenced by its plasma availability, and although dietary supplements can enhance skin vitamin C content, this is primarily effective in individuals with below-optimal plasma levels
Rosenbaum, D
Scand J Clin Lab Invest 74:561567 Hackler J, Heller RA, Sun Q, Schwarzer M, Diegmann J, Bachmann M, Moghaddam A, Schomburg L (2021) Relation of serum copper status to survival in COVID-19
NAD+ is a systemic lever for energy, mental clarity, and healthy aging, while peptides are targeted tools for repair, skin quality, and recovery