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lutein from marigold asteraceae tagetes plants raised in a pigment widely used in food additives, also used as a medicinal pigment. lutein is a widely found in vegetables, flowers, fruits and other plants in the natural material, living in "class carrot category of" family matter, now known to exist in nature, more than 600 types of carotenoids, only about 20 species exist in the person's blood and tissues. in the human body found in carotenoids include d a-carotene, p 1 carrot category, cryptoxanthin, lutein, lycopene, and are not flavin. medical experiments prove that the plant contains a natural lutein is an excellent anti-oxidant in food by adding a certain amount of lutein can prevent cellular senescence and aging body organs, but can also prevent age-related macular degeneration eye due to decreased vision and blindness, through a series of medical research, carotenoids have been proposed as cancer prevention agents, life-prolonging agent, ulcers resist agent, a heart attack and coronary artery disease resistance agent. at the same time, lutein can be used as feed additives for poultry meat and eggs for coloring, but also has been in the food industry as a coloring agent with the nutrition and health care.