Lutein, a derivative of alpha-carotene is a natural plant dye, colouring in yellow, is also present in the yolk of egg. In the body, located primarily in the retina of the human eye (together with Zeaxanthin), it acts as a natural filter for the eye, absorbing ultraviolet radiation. It is a powerful antioxidant, neutralizing free radicals. Available in the form of mono-preparation supplements and multi-compound supplements with antioxidant, protecting the eyes, action, as well as multivitamins, creatine stacks and no-boosters.