It’s common for people watching their figures to eat egg whites. I have never done this because I feel so guilty throwing out the yoke. In order to make a healthier lifestyle we started buying liquid egg whites and it is so much nicer! It is more expensive but when you only eat 1/4 cup of egg whites (50 calories) then it’s a worth while investment. They last about 7 days after being opened so writing the date on the front is a good idea.