http://news.yahoo.com/egg-yolks-eat-toss-133128675.html 

"With only about 70 calories per large egg and a boatload of important nutrients, you should be eating the entire egg! Even better, the American Heart Association lists eggs as a "Healthy Food for Under $1" making it a budget-friendly choice."

"Besides having a relatively good amount of protein, the yolk also contains heart-healthyunsaturated fat, including omega-3 fats."