Lutein powder is a natural colorant extracted and refined from marigold flowers using scientific methods. It belongs to carotenoids. It has the characteristics of biological activity, bright color, anti-oxidation, strong stability and high safety.

Lutein, also known as "eye gold", is the most important nutrient in the human retina. It is contained in the macula (the center of vision) and lens of the eye, especially in the macula, which contains high concentrations of lutein. Lutein is an important antioxidant and a member of the carotenoid family, also known as "phytoalexin". It is found in nature together with zeaxanthin. Scientific studies have shown that lutein is the only carotenoid found in the retina and lens of the eye, an element that the body cannot produce itself and must be supplemented by external intake.

If this element is lacking, the eyes will go blind. Ultraviolet and blue light from sunlight entering the eye can produce large amounts of free radicals, leading to cataracts, macular degeneration, and even cancer. Lutein, on the other hand, can filter blue light and decompose the damage of bright light and ultraviolet light to human eyes, thus avoiding the damage of blue light to the eyes and preventing vision degeneration and blindness caused by lutein deficiency, which is why lutein is also known as the protector of the eyes.