After boiling the egg does it loose proteins?

Answer:
maybe a little, but not much. How else are you going to eat an egg besides it being cooked.

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Eggs are actually quite nutritious. They are not just fat (yolk) and protein (white). In fact, they contain a wide array of essential vitamins and minerals. Here is what's in an egg...
Vitamins
A: good for the skin and growth.
D: strengthens bones by raising calcium absorption.
E: protects cells from oxidation.
B1: helps properly release energy from carbohydrates.
B2: helps release energy from protein and fat.
B6: promotes the metabolism of protein.
B12: an essential vitamin in the formation of nerve fibers and blood cells.Minerals
Iron: essential in the creation of red blood cells.
Zinc: good for enzyme stability and essential in sexual maturation.
Calcium: most important mineral in the strengthening of bones and teeth.
Iodine: controls thyroid hormones.
Selenium: like vitamin E, it protects cells from oxidation.
best type of protein If that wasn't enough, egg whites contain the purest form of protein found in whole-foods. It is so high that nutritionists use them as the standard when comparing other whole-food proteins. Their "biological value" -- a measurement used to determine how efficiently a protein is used for growth -- is 93.7. Milk, fish, beef, and rice respectively have a bio value of 84.5, 76, 74.3, and 64.
The higher the value, the better the protein is absorbed. This is why many bodybuilders include eggs in their diet. When a person eats beef, for instance, all of the protein is not necessarily absorbed and used to rebuild tissue. Protein is a complex substance, which is why bodybuilding protein supplement makers are constantly trying to refine the quality of their product and why some protein shake brands boast that their protein is made from egg whites. Having said that, each large egg contains 6.3 grams of protein.
how to eat eggs Experts advise that despite being low in saturated fat, one should not eat more than two eggs a day on a low-fat diet. Egg yolk is mainly fat, so even though it doesn't raise blood cholesterol levels, it can cause other problems if abused.
Contaminated eggs kill up to 5000 individuals each year. One egg in 10,000 is contaminated with salmonella, so you should never eat undercooked eggs, make eggnog on your own or mimic Rocky by swallowing them raw. The proper way to cook eggs depends on the type of food served. The American Egg Board advises that grills should never be set higher than 250F. Anything above that will leave the interior raw while burning the outside. If an egg has runny parts, it means it is still not cooked properly.
mmm, mmm, eggs So now you know the truth about the incredible, edible egg. Once a foe, now a friend, this mighty whole-food contains many great nutrients and isn't as bad as people once thought. A great source of protein and easy to prepare, eggs are nature's golden food... if you don't eat too much of them, that is.

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Well, the proteins, I forget the term(!).
It's like congeal. The protein strands unravel (or loosen) and just stretch out just a bit. Before the heating, the protein strands were all twisted up together. After boiling, the strands stretch out and lose their conformation (shape). That is why the white changes its consistency, and the yellow of the egg, too.
The egg is still nutritious, unless you boil it way too long.

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