Not the more recent versions but maybe 10 years ago when there were +
Haven’t tried the Buffet with copper by The Ordinary, but Niod Cais seemed ok, except I don’t +
Which is the best copper peptide to add to a serum or moisturizer? ++
It’s not really a vitamin C (as in, ascorbic acid), but instead a derivative form +++
Ingredients in a cream are more likely to penetrate better, at least that has been +++
PC C15 has a distinct smell (as it has both ascorbic acid and ferulic acid). Vichy Liftactiv +++
This rendition is actually an improvement from a technical point of view. Skin tolerably +++