Food Sources. Lutein and zeaxanthin are found together in many food sources. Dark green leafy vegetables are the primary source of lutein and zeaxanthin, but they are also present in lesser amounts in other colorful fruits and vegetables, such as broccoli, orange peppers, corn, peas, persimmons and tangerines.ark green leafy vegetables are the primary source of lutein and zeaxanthin, but they are also present in lesser amounts in other colorful fruits and vegetables, such as broccoli, orange peppers, corn, peas, persimmons and tangerines.
The land rises into the Ennedi and Wadai plateaus along the eastern border with Sudan, where elevations reach near 2000 ft (609 m). In the south, the forested land is nourished by the Chari and Logone Rivers. During the monsoon rains, Lake Chad often overflows, causing floods in the lowland depression of the south. The highest point of Chad is Emi Koussi, which rises 11,204 ft (3,415 m); the lowest point of the country is the Djourab Depression at 524 ft (160 m). 1  Landforms of Africa.
Chad is in fifth place for largest African countries by area, with a total area of about 1,284,000 square kilometers. Chad is centrally located in Africa, and its capital is N'Djamena. The population of Chad is about 10.1 million.udan is located in northeastern Africa, and its capital is located in Khartoum. The population of Sudan is about 67 million. The fourth largest country in Africa is Libya, with an area of 1,759,540. Libya is situated in the far north of Africa along the Mediterranean Sea, and its capital is Tripoli.