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doi:10.1371/journal.pone.0135268

Geng H, Li Z, Li Z, Zhang Y, Gao Z, Sun L, Li X, Cui J, Ni S, Hao J

Applying copper peptides after a session can increase absorption significantly

Waldorf agrees, noting that retinol and vitamin C can be used together, but she generally prescribes antioxidants for daytimeto add to the protection provided by sunscreenand retinol at nightwhen theres no ultraviolet [exposure]. What to know before using retinol and vitamin C together Using both retinol and vitamin C in your skincare routine can help expedite the process in which the skin appears brighter and more even-toned, explains Dr