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.
LOCATION AND SIZE. The former French colony of Chad, a landlocked country located in northern Central Africa, is more than 3 times the size of California.The country has an area of 1,284,000 square kilometers (495,755 square miles), with a land boundary length of 5,968 kilometers (3,708 miles).ake Chad in the southwestern part of the country is the largest body of water in the Sahel region. Chad also has the Tibesti mountain range in the far north, some smaller mountains in central Chad, and a few hills near the southern and western borders.