This is the yellow pigment found only in the macula of the retina, which controls central visual acuity and color vision. Macular pigment also is a powerful antioxidant and helps protect the retina from damaging effects of high-energy visible light (blue light). In the study, 53 healthy subjects with low baseline concentrations of MP took a daily supplement containing 10 mg lutein, 10 mg meso-zeaxanthin and 2 mg zeaxanthin.
The Douc Langur lives in forests in the eastern part of Indochina, such as Cambodia, Vietnam, and Laos. They like to eat vegetation such as tree leaves and fruits. Their distinct colorful patterns have earned them their reputation for being the most colorful member of the monkey family.
With its colorful fur, the Douc Langur is popularly regarded as the most beautiful species of monkey in the world. Their population has dropped due to habitat loss from war and deforestation, and due to their being captured for pets.