According to our experts, the vitamin C type will also determine its effectiveness. Pure vitamin C, known as L ascorbic acid, ...

I use it every morning before I apply my moisturizer and I use it every night as part of my skin care routine.” Maelove’s The ...

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 ...

Meet the cult-favorite of all vitamin C serums. SkinCeuticals’ C E Ferulic with 15% L-Ascorbic Acid is a tried-and-true ...