New in box EXCELLENT condition When it comes to brightening up a dull complexion, vitamin C is a hero ingredient. You’ll find a highly effective, revolutionary powder that works for a full 12 hours to help firm and brighten skin, minimize dark spots, promote collagen production, reduce the appearance of fine lines and wrinkles. How to Use It: Shake it up, then mix a small amount with the skincare product of your choice like toner, serum, or moisturizer then smooth it all over your face and neck.