UAMS Department of Neurobiology and Developmental Sciences - Nerves of the Back. Some of the material presented in these tables is contained in the book: MedCharts Anatomy by Thomas R. Gest and Jaye Schlesinger. Published by ILOC, Inc., New York. Copyright  1995.
Calories in egg yolk vs egg white. Most of the calories in eggs, as well as all of the fat content, is in the yolk. The yolk from a large egg contains about 55 calories and just over 180 mg of cholesterol. An egg white contains 17 calories and no fat content at all.
Most of the fat in a hard boiled egg is contained in the yolk. The yolk provides about 55 calories worth of combined fat and protein. Egg whites, on the other hand, are packed with fat-free nutrition. You'll consume 4 to 5 grams of protein, just 17 calories, and virtually no fat in a single large egg white.