Yolk Or No Yolk?
A single egg contains all the essential building blocks and ingredients to create a chicken. Eggs get a bad reputation these days for their high cholesterol level but I think this is undeserved. High cholesterol isn't a disease after all, heart trouble is a disease! The dangers of high cholesterol have been overblown whilst the benefits have been completely downplayed. Cholesterol is a vital factor in good brain function, blood sugar level regulation, immunity and cell repair. There are much larger problems in the western diet than cholesterol and it doesn't deserve to be at the top of the list for people to worry about here. The real reason we have unprecedented levels of obesity and type 2 diabetes is down to processed foods.
The people who eat eggs on a regular basis have actually been show to have less LDL's and more HDL's because of it. Just look at the people who try to cut down their dietary cholesterol, often times they'll still have elevated blood cholesterol anyway! Cholesterol is produced by our liver, if we don't get enough of it in our diet our body just makes it anyway, so again, dietary intake has very little effect on our overall blood level of cholesterol. Still, if you don't agree and want to cut down your dietary intake of cholesterol, you can just combine a few egg whites with some whole eggs to cut down on your yolks.
Whilst egg whites contain half the protein of an egg as well as some riboflavin and selenium, they don't contain anywhere near as much nutrition as the yolks. Egg whites should be eaten with the yolk, because then the amino acid profiles then become balanced and the overall protein concentration more bioavailable. Despite the bad press of cholesterol levels, the main reason people seem to forego their egg yolks appears to be the high calorie count. Although the nutritional benefit of every egg varies by type and size, generally the yolk makes up about 33% of the liquid weight in each egg and it also contains about three times the amount of calories as the white.
The reason the yolk is orange/yellow/red is because its made up of lots of zeaxanthin and lutein. Yolks are a great source of choline, they cut down inflammation and increase neurological functions at the same time. Because inflammation is lessened, so are the symptoms of arthritis and osteoporosis. For pregnant women, egg yolks are extremely beneficial too because they help improve fetal brain development and eye vision too because of the two carotenoids (zeaxantin, lutein) they contain. Again for pregnant women, the amount of iron in egg yolk will also help if you have a low haemoglobin count.
The only difference between egg whites and egg yolk omelettes is the amount of fat in them and depending on whether you want to lose weight or put on muscle you can change which ones you eat accordingly. Eggs are full of protein, they're versatile and quick to make. You can boil, fry or scramble them and end up making omelettes or frittatas in minutes, this is why I think they're such a great food for anyone in bodybuilding or fitness. Still, remember that it doesn't matter how many you're eating if you don't exercise enough, you'll never achieve the body you really want without a consistent healthy regimen. A healthy heart and strong metabolism are always byproducts of healthy foods (including eggs!) and proper training.