The NIH also known as National Institutes of Health is an important medical research agency and an integral part of the American Department of Health and Human Services. Their main objective is to work on improving health and living standards. In order to execute their plans NIH carries out various researches that result in informative discoveries. It is due to the efforts of the NIH that the Americans today have the ability to live a long and healthy life. This has become quite evident from the increasing rate of life expectancy.