St. Ives Vitamin K Dark Circle Diminisher Under-eye Treatment is a revolutionary patented treatment that reduces the appearance of dark under-eye circles. Independent clinical tests prove it works. With daily use, in just weeks you will begin to see the benefit and after 8 weeks, you should see dramatic improvement! In 2 weeks: smoother skin. In 4 weeks: improves the appearance of dark circles. In 8 weeks: significantly reduces the appearance of dark circles. This product not tested on animals.