I have had dark spots, acne spots and age spots on my face for some time now . I have been using this serum for about a week and a half and I'm starting to see my skin all even out and and start to look more of all one color . All of the dark spots on my skin are evening out . I haven't had any break out from this serum . I also haven't had any rashes or any other side effects . It feels nice and smooth going on . I just follow the directions and it is working great on my fave and neck . I received this serum at a deeply discounted price in exchange for my honest opinion.