Quick Overview
DOCTOR'S Best Lutein's most active ingredient is Marigold Extract or Biolut, which is a natural source of lutein and very bioavailable. In fact, it is the most abundant source of lutein in nature. Lutein itself is a carotenoid widely distributed in the human circulatory system but its highest concentration is in the eye mainly in the retina. Lutein's main purpose in the human anatomy is as a free radical scavenger and other than the eye; high concentrations can also be found in the lungs, heart, skin, and numerous other soft tissue.