Gives you good eyesight & eye protection. Lutein is a type of carotenoid found mainly in leafy green vegetables, which is to protect against light-induced retina damage. It is a powerful antioxidant that protects the macula by absorbing the damaging blue light. Macula is critical for sharp central vision, lutein plays an important part to supplement the health of our macula. The yellow pigment of Lutein is able to filter blue light and protects eyes from oxidative stress & damages. However, human body are unable to produce it naturally, hence they must be consumed.