Dr. Shirazi recommends Drunk Elephant’s C-Firma Fresh Day Serum for all skin types. “[It] includes 15% L-ascorbic acid in a pH-balanced formula with pumpkin ferment extract and soothing ...

“Vitamin C – otherwise known as L-ascorbic acid – is notoriously unstable, so creating a formula that stabilises ... you can release it into the serum, give it a shake and it’s ready ...

All of our experts recommend Skinceuticals CE Ferulic, a serum containing 15% L-ascorbic acid. It’s often referred ... According to the brand, however, the formula should remain stable and ...

Vitamin C often comes in lightweight serum form ... C Complex keeps it simple in terms of formulation, setting a stable form of l-ascorbic acid (vitamin C) alongside hydrating hyaluronic acid ...

Now enhanced with peptides to firm the skin, BeautyStat's vitamin C boasts 20% stable L-Ascorbic acid, which makes it perfect ...