Lutein, the most prevalent carotenoid in the eye, helps to slow or reduce age-related macular degeneration and protect eyes from free-radical damage, cataracts, glaucoma, and diabetic retinopathy. Sisu Lutein 20 mg nourishes and protects eye tissue with the best clinically researched brand of lutein, FloraGLO®, which is recognized by practitioners for its superior bioavailability and absorption.