And while there are serums out there with *many* different vitamin C derivatives, I find that L-ascorbic acid serums give me ...
L-ascorbic acid is the most powerful type of vitamin C and can help brighten skin and prevent signs of aging. Here are the ...
“L-ascorbic acid is the most active form of vitamin C, whereas the derivatives are inactive. They have to be converted to the active form and are less potent than the pure, active ingredient.