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The yolk makes up about 33% of the liquid weight of the egg; it contains about 60 kilocalories (250 kJ), three times the energy content of the egg white, mostly due to its fat content. [clarification needed] All of the fat-soluble vitamins (A, D, E and K) are found in the egg yolk. Egg yolk is one of the few foods naturally containing vitamin D.
The United States Department of Agriculture sizing is based by weight per dozen. [4] The most common U.S. size of chicken egg is 'Large' and is the egg size commonly referred to for recipes. The following egg masses including shell have been calculated on the basis of the USDA sizing per dozen:
A reasonably firm white permits the yolk to approach the shell more closely which results in a fairly well defined yolk outline when the egg is twirled. With respect to a broken-out egg, a reasonably firm white has a Haugh unit value of 60 up to, but not including, 72 when measured at a temperature between 45 o {\displaystyle ^{o}} F and 60 o ...
The color of an egg yolk is entirely dependent upon a hen's diet, an expert said. A diet with more carotenes and xanthophylls will produce a darker yolk.
The yolk of the eggs have not yet fully solidified. Eggs contain multiple proteins that gel at different temperatures within the yolk and the white, and the temperature determines the gelling time. Egg yolk becomes a gel, or solidifies, between 61 and 70 °C (142 and 158 °F). Egg white gels at different temperatures: 60 to 73 °C (140 to 163 °F).
"More than 20 years ago, researchers discovered there was a correlation between high blood cholesterol and eggs, which gave eggs a bad rap due to the cholesterol level of an egg yolk ...
Ostrich eggs are the largest of all eggs, [4] though they are actually the smallest eggs relative to the size of the adult bird — on average they are 15 cm (5.9 in) long, 13 cm (5.1 in) wide, and weigh 1.4 kilograms (3.1 lb), over 20 times the weight of a chicken's egg and only 1 to 4% the size of the female. [5]
Also, milk, cheese, butter and eggs are often all sold next to each other in the grocery store, many times in what is deemed the dairy section. And lastly, here’s where it gets complicated—vegans.