Both drugs had been previously recommended for approval 14-0 by members of FDA's Anti-Infective Drugs Advisory Committee. The significance of two new antibiotics in four weeks? We've recently been averaging one antibiotic every three years.
Skin color is due primarily to the presence of a pigment called melanin, which is controlled by at least 6 genes. Both light and dark complexioned people have melanin. However, two forms are produced--pheomelanin, which is red to yellow in color, and eumelanin, which is dark brown to black.
Page 2 of 5 Skin In the skin melanin is made of smaller component molecules, and there is a variety of different types of melanin with different molecule bonding patterns. Pheomelanin (melanin red-brown in colour) and eumelanin (melanin which is black-brown in colour) are found in the skin and hair.elanin production is stimulated by light from the sun as well as artificial light. The body has the ability to use UV light from the sun in order to make Vitamin D. Vitamin D is used in the body to turn into a hormone which stimulates the absorption of calcium in the intestines.