Lutein is yellow to orange carotenoid found in dark green leafy vegetables like marigold, spinach and kale, yellow corn, egg yolks, squash, and carrots.extracted from marigold flower extract is very hot in market. Lutein is concentrated in the retinas of your eyes, so it's thought to be beneficial for vision. Lutein is also one of the antioxidants that appear to be useful as a supplement. And lutein could help slow down the progression of macular degeneration. Lutein Powder are widely used in food additives, also used as a medicinal pigment.