The yolk is more nutritious.

Every 100 grams of egg white contains 10 grams of protein, 0.1 grams of fat, 1 gram of carbohydrate, 0.6 grams of ash. Calcium 19 mg, phosphorus 16 mg, iron 0.3 mg, riboflavin 0.26 mg, niacin 0.1 mg; vitamins A and C deficiency.

And eggs in the main minerals, vitamins, phospholipids, etc. in the yolk. The main components of the yolk are 17.5% protein, 32.5% fat, and about 48% water and 2% minerals, as well as a variety of vitamins and so on.

This shows that the egg white does not contain as many nutrients as the yolk, so the yolk is more nutritious than the egg white.

Expanded Information:

Egg yolks have good amounts of phosphorus, calcium, iron and other minerals. The fat-soluble vitamins A, D, E, and K, as well as the vast majority of the B vitamins, are found mainly in the yolk.

Lutein and zeaxanthin, which are good for vision, and lecithin and betaine, which are good for preventing chronic diseases, are also in the yolk. And, as scary as cholesterol sounds, it's actually a nutrient the body needs.

In the past, it was often said that a day's intake of cholesterol should not exceed 300 milligrams, which was for the control of blood cholesterol. Nowadays, the nutritional community at home and abroad agrees that the amount of cholesterol eaten into the body does not have a significant impact on the level of blood cholesterol, and there is no longer a limit on cholesterol.

Baidu Encyclopedia - Egg White

Baidu Encyclopedia - Egg Yolk