Zetinol™ works from the inside out to help you get more sleep and  better than ever before. The ingredients in Zetinol™ are designed to penetrate deeply to attack your concentration problems head on. This means that, unlike other concentration solutions, the ingredients in Zetinol™ are designed to attack your concentration problems from every direction. Zetinol™ is not only designed to promote longer attention span, it is specially formulated to promote better focus, restlessness, and more on contact! The ingredients in Zetinol™ work because it is the only product of its kind specifically designed to promote better concentration.