Vitamin C is an effective antioxidant that neutralizes free radicals and thus helps protect the skin. It is also significantly involved in collagen formation and ensures smooth skin with fewer wrinkles. The FACES OF FEY Vitamin C Booster contains as much as 20% 3-O-ethyl ascrobic acid. In contrast to the other vitamin C derivatives, this particular vitamin C derivative does not have to be converted into ascorbic acid first, but can have a direct effect. It is particularly effective for blemished skin, pimples and other pigmented spots. The boosters have been specially developed for use with ultrasound and microneedling and are also ideal as a 30-day intensive treatment when used individually.