Dermatologists weigh in on the best L-ascorbic acid serums for glowing skin. Shop top-rated vitamin C serums from ...

Of all the vitamin-C options, our experts generally recommend looking for serums that contain ascorbic acid, also known as L-ascorbic acid, which is the most active and purest form of vitamin C.

For example, L-ascorbic acid, a form of vitamin C found in many skin care products, degrades when it is exposed to heat, a high pH or sunlight, which can happen during transit and storage.

The type of vitamin C used in the serum is also essential, with L-ascorbic acid being the most potent and stable form. Additionally, the serum’s formula should be stable, ensuring that the ...

When it comes to purchasing vitamin C oil, it’s important to choose a product that contains a stable form of vitamin C, such as L-ascorbic acid or ascorbyl palmitate. These forms of vitamin C ...