As Isaacs explains, “Ascorbic acid is the gold standard for vitamin C but only stable at a pH less than 3.5. For this reason (the low pH) it can be harsh to skin and cause irritation.

C serums for glowy skin, tested by a beauty expert - We’ve answered your burning questions regarding vitamin C and have tried ...

L-ascorbic acid, otherwise referred to as vitamin C, is a potent antioxidant that fights free radicals and brightens skin tone. An all-round hero ingredient, it helps prevent signs of ageing by ...

At this point, we know you're inundated with skin-care ingredient after skin-care ingredient — but hear us out: The best ...

Vitamin C is also a potent antioxidant, which means it protects skin cells from further damage either from the sun or outside pollutants. A small 2004 study found that using 5% ascorbic acid cream ...

L-ascorbic acid is water soluble ... Other formulas I’ve used sometimes react badly with my other skin-care products and pill, but this never does. Admittedly, it’s expensive, but it ...

Anthralin 1%; crm, contains salicylic and ascorbic acid. Initially apply once daily ... to 20–30 minutes before washing off. Treat until skin is entirely clear. Individualize.