[header] How to make a healthy omelet [title] Consider the nutritional value of egg yolks. [step] Though whole eggs contain a bit more protein than egg whites, their relative value comes from nutrients and vitamins that are plentiful in the egg yolk. For instance, even a small raw egg contains meaningful amounts of iron, phosphorus, zinc, and folate. 
Further, yolks also contain good vitamins a and d, as well as a bunch of choline, lutein, and zeaxanthin, all of which your body needs. [title] Substitute egg whites to limit cholesterol.