Powerful Vitamin C serum for Melasma & Hyperpigmentation. This is a daily serum for anti-pigmentation and Melasma! It WORKS!  Amazing results. Melasma is one of the toughest skin conditions to reverse but with the use of this serum twice a day the results are undeniable. Phyto Barrier MelaRX is 10% Vitamin C that enhances skin tone, complexion and transparency. For all skin types. Dark spots and Melasma.