Normally, each egg contains only one yolk because hens release only one egg per laying cycle. However, sometimes two eggs are released almost simultaneously and travel through the fallopian tube together. In this case, they are enclosed within a single layer of egg white and a single shell, resulting in an egg with two yolks, according to the health website Verywell Health (USA).
Eggs with two yolks may contain more nutrients because they are usually larger.
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This phenomenon is commonly seen in young hens that have just begun laying eggs. At this stage, the hen's reproductive system is not yet fully stable, so the release of two eggs at the same time can occur. Some older hens or those with special genetic factors may also lay double-yolk eggs more frequently.
Because they contain two yolks, these eggs are usually larger and heavier than regular eggs. This is also why many people can identify double-yolk eggs from the outside by their weight or size.
In terms of total nutritional content per egg, double-yolk eggs are more nutritious than regular eggs. The yolk is where most of the egg's vitamins, minerals, and fats are concentrated. It is also a source of high-quality protein along with many important nutrients such as vitamin A, vitamin D, vitamin B12, folate, choline, selenium, and the antioxidants lutein and zeaxanthin.
No difference in nutritional quality.
Because they contain two yolks, they typically provide more protein, fat, vitamins, and minerals than a single egg. However, this doesn't mean they are significantly better.
It's important to understand that double-yolk eggs differ from regular eggs primarily in nutritional content, not nutritional quality. They don't contain any special vitamins or minerals that regular eggs lack. Consumers receive more nutrients simply because the egg has two yolks instead of one, resulting in higher levels of protein, fat, cholesterol, and certain vitamins in the yolk.
A study published in the journal Foods compared the chemical composition of double-yolk eggs and single-yolk eggs. The results showed that double-yolk eggs have a higher content of fat and some fatty acids, and their overall nutritional value is also slightly better.
For those who regularly go to the gym. For those with high energy needs, double-yolk eggs are a good option to supplement protein and micronutrients. In addition to protein, the yolks also provide choline, a nutrient crucial for nervous system function and muscle function, according to Verywell Health .
Source: https://thanhnien.vn/trung-2-long-do-co-tot-hon-trung-thuong-185260625141812121.htm
