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.

The key is to look for the type of vitamin C being used. 'L-ascorbic acid or ascorbic acid is more stable than others and will maintain its strength longer.' As you probably know, there are ...

IN 1934 Bacharach, Cook and Smith 1 reported that the concentration of ascorbic acid in the peel of oranges was greater than that in the juice. This was the result of tests carried out on five ...

C. Ascorbic acid as a sensor of oxidative stress and a regulator of gene expression: The Yin and Yang of Vitamin C. Med Hypoth 69, 953–954 (2007). Grollman, A. P. & Lehninger, A. L. Enzymic ...