1, egg white: egg white accounts for 28%. Mainly including protein.
2, egg yolk: egg yolk accounts for 72%. Mainly contains lecithin, lipid lecithin, phospholipids, triglycerides and cholesterol. Phosphorus, sulfur, calcium, chlorine, potassium, sodium, magnesium and iron; VA, VE, VB 1, VB2, nicotinic acid, pyridoxine, pantothenic acid, biotin, folic acid, VD; Lutein, zeaxanthin, cryptoxanthin, etc.
In short, most of the nutrients in eggs are concentrated in the yolk. The two yolks of "double yellow egg" are the same size, so its nutritional value should be twice that of single yellow egg.
Formation mechanism of "double yellow egg"
1. Physiological reasons: It is more common in hens, which is caused by vigorous reproductive function and excessive secretion of follicle-stimulating hormone and ovulation-stimulating hormone.
2. Genetic reasons: the high rate of double yellow has become one of the stable genetic genes, which has been passed down from generation to generation. The double yellow rate of Ruxingza 288 laying hens was 2.77%; The double yellow rate of Gaoyou duck is 1% ~ 14%. Double yellow eggs for the above two reasons have similar yolk size.
3. Pathological reasons: most of them are due to sudden fright, flying wildly, sudden increase of abdominal pressure and rupture of "follicular suture mark", which leads to the removal of two or more egg yolks, and the size of two or more egg yolks is very different.
Based on the above analysis, babies can eat double yellow eggs, but it is best for babies under one year old not to eat more egg yolks.
——————————————— 6. Editor's answer of home network (_)