However, formulations supplemented with vitamins, even in
the ester form, may present low shelf-life [7]. It is well known that
the stability of all vitamin C derivatives is influenced also by structural
properties of the formulations [1,8]. Thus, in the development
of a cosmetic formulation, it is necessary to choose suitable vehicle
raw materials because they must be compatible with the active
substances selected to attend the indication for use of the product