Why do duck eggs have white shells and green shells? Which type should I choose?

When buying duck eggs, we will see there are 2 types, blue shell and white shell. Why do duck eggs have 2 different colors and should choose white or blue, which color shell is better? We invite you to find out in the article below.

Why do duck eggs have different colors?

The difference between blue and white duck eggs is mainly determined by the duck's genes. In addition, the habitat and food of ducks also contribute a small part. In fact, the eggshells of other poultry species such as chickens, geese, etc. also have different colors.

Should you choose duck eggs with blue or white shells?

Both green-shelled and white-shelled duck eggs have good nutritional value, rich in protein, lipid, calcium, iron and high-quality mineral elements.

 

However, many people believe that duck eggs with green shells should be chosen because:

1. Blue duck eggs have thicker shells than white, so they better protect eggs, so they have a longer shelf life, about 40 days. Meanwhile, white shell duck eggs have a slightly shorter shelf life.
2. The content of protein and acids in green-shelled duck eggs is higher than that of white-shelled eggs, but the content of selenium and lysine is lower. Although the difference is not too big, if you have a choice, you should choose eggs with blue shells.

How to choose fresh duck eggs?

1. Listen to the sound: Hold the egg close to your ear and shake it. If there is no sound, the duck eggs are of good quality, and if there is a slight noise inside, the duck eggs may have been stored for a long time and should not be purchased.
2. Hand feeling: When choosing duck eggs, you can hold it in your hand and feel it. Should choose eggs with a slightly rough shell, with a layer of white chalk.

Note: Duck eggs should be stored in the refrigerator to keep them longer. And remember to clean the eggshells thoroughly before putting them in the refrigerator.