SkinCeuticals Vitamin C E Ferulic Serum All of our experts recommend Skinceuticals CE Ferulic, a serum containing 15% L-ascorbic acid. It’s often referred to as the gold standard in vitamin C ...

Its main active ingredient is L-ascorbic acid (it comprises 15 percent of this serum), and despite the high concentration of pure vitamin C, it is stable and easily penetrates the skin.

Each bottle contains 15% L-ascorbic acid that promises to stay fresh (and therefore more effective) the whole time you’re using it. Inside the white lid is the pure vitamin C powder, then when ...

Best L-ascorbic acid to use with make-up: AlumierMD Vitamin Rich Smoother (C&E) AlumierMD Vitamin Rich Smoother (C&E), £67.50, contains 15% L-ascorbic acid and vitamin E which brightens and ...