It's eight weeks to more visibly even skin tone! Bye Bye Dark Spots Concentrated Derma Serum is your dermatologist-tested treatment for dark spots on your face. Formulated with 4% niacinamide and 1% ethyl vitamin C, this hyperpigmentation serum visibly reduces dark spots and discoloration while helping improve your skin's clarity. Get ready to say "bye bye" to dark spots. More even-toned skin is here!