For the best radiance, the Beauty Time team recommends continuing to use the product for at least 2-4 weeks to notice a clear difference in skin tone and texture
Important: maintain pH above 5.0, as the copper ion dissociates in acidic conditions
Additionally, changes in red cell distribution width (RDW) have been observed, with substantial increases during acute COVID [344,345,346,347,348]
A recent small scale study in healthy humans aged 1985 measured the ratios of cysteine:cystine and GSH:GSSG in plasma [99]
Based on differences in the carbon skeleton, phenolic acids can be mainly divided into two categories: hydroxycinnamic acid (e.g., cinnamic acid, ferulic acid, caffeic acid, and chlorogenic acid) and hydroxybenzoic acid (e.g., gallic acid, ellagic acid, syringic acid, and Danshensu) [157]