Eggs are a good source of several minerals that can be hard to get in other foods, such as iodine and selenium. “Eggs are also one of the few foods that are naturally a good source of vitamin D., which helps build strong bones with the help of calcium,” Kanter said. But, he added, eating only egg whites doesn’t give you all the good stuff. “Nutrients found exclusively in the yolk include choline, vitamin B12, vitamin D and iron among others,” he said. Many nutritionists believe that, for healthy people, eggs’ excellent nutrition profile mitigates its cholesterol content. - See more at: http://www.livescience.com/50834-eggs-nutrition-facts.html#sthash.QKSW2tgb.dpuf