Egg yolks are also a natural source of fat, which is another factor which makes them healthier for you. If possible, organic eggs are an even better choice.
Eggs have come under alot of bad press recently, which is really unjustified. If you are a physically active person, the animal fats (particularly saturated) won't be a problem as you're "burning them off".
As for cholesterol, dietary cholesterol doesn't equal blood cholesterol. Most of the cholesterol in our body is made by our liver and large intestine, and only a very small amount comes from the foods we eat.
What you should be looking at is, "which foods/ fats raise HDL, LDL and VLDL levels?". It is these lipoproteins which are responsible for properly transporting cholesterol molecules, and removing any excess from your circulatory system. Egg yolks raise both "good" HDL and "bad" LDL levels almost equally, which means that no there is no significant change in blood (serum) cholesterol levels.
What is responsible for raising LDL/ VLDL levels significantly are processed, unnatural oils such as hydrogenated "trans fat" oils and cheap vegetable oils. These are the fats/ oils that you should avoid.
- B.A