Dietary supplement. Natural carotenoid. The lutein in this product is extracted from marigolds and purified by an exclusive patented process (U.S. Patent No. 5,382,714). Lutein is the most abundant carotenoid found in fruits and vegetables, and is especially concentrated in the macula of the eye. TwinLab Lutein is in a dry, water dispensed form. Well tolerated by most highly allergic individuals. No soy, yeast, milk or egg products. No added sugars, salt (sodium), preservatives or tablet binders and coatings.