No egg yolk is not bad for health. The yolk is high in nutritive value. The yolk contains 100% of the fat soluble vitamins A, D, E and K as well as all the carotenoids, lutein and zeaxanthin found in an egg. Also contains more than 90% of the calcium, iron, phosphorus, zinc, thiamin, folate, vitamin B6 and vitamin B12. Compared to the yolk, the white doesn’t bring much to the table in terms of nutrients. An egg white contains more protein than the yolk, but it’s only because the yolk is smaller.
The reason why we find a high amount of cholesterol in the egg yolk is not an evil trick played by Mother Nature to damage our health with the exact foods that are full of nutrients, but because cholesterol is an extremely important nutrient that is much needed by the future animal that should come out of the egg if no one interferes. Cholesterol is not only important for the future bird or reptile, but for us too. It’s the precursor to all sex hormones and is used by every cell of the body. It has also been shown countless times that dietary cholesterol raises the “good” HDL, while it’s the sugar, especially fructose, grains and omega-3/omega-6 imbalances that raises the “bad” LDL and the triglycerides in the blood.