I don't use it as a mask every day because I feel like it is maybe a little too acidic for a daily mask. I do, however, wash my face with it daily and haven't had any issues. I am thinking that if you have sensitive skin, I would back off to a couple times a week. The baking soda is working great at scrubbing my pores and cleaning out blackheads. The vitamin C is working great at tightening my skin, minimizing pores, and brightening skin. I follow up with a great little cream I made from coconut oil and vitamin E oil. This cream is FAB...doesn't clog pores, great for cuticles and hands...
Try it out and let me know what you think!