25 Facts About Eggs You Need to Know

Eggs are a versatile and nutrient-packed food consumed worldwide. Rich in high-quality protein, they contain all nine essential amino acids, making them a complete protein source. Eggs are also an excellent source of vitamins like B12, D, and minerals such as iron and selenium. The yolk provides healthy fats and important nutrients like choline, which supports brain health. Eggs come in various colors, depending on the breed of the hen, and can be prepared in numerous ways, from boiling to scrambling. Their combination of nutrition and simplicity makes eggs a staple in many diets.

Eggshells Vary in Color
Eggshell color depends on the hen’s breed, with common shades like white, brown, and blue.
Eggs Have Natural Air Cells
As eggs age, a small air cell forms between the shell and the inner membrane.
The Yolk Color Reflects Diet
The more yellow or orange the yolk, the richer the hen’s diet is in nutrients like carotenoids.
Humans eating eggs from how long
For about 6 million years, eggs were consumed uncooked by humans from the nests of untamed birds. By 3200 BC, India had domesticated jungle birds for egg production, and the first cultures to domesticate hens are assumed to have been Ancient Egypt and Ancient China.
Country That eats most eggs
Japan eats the most eggs annually per person. In Japan, the typical individual consumes around 320 eggs annually. Nearly one egg per day.
Eggshells Are Porous
An eggshell contains about 7,000 tiny pores that allow air and moisture to pass through.
Fresh Eggs Sink in Water
Old eggs float because their air cells grow larger as moisture escapes through the shell.
Production volume of eggs
Global egg production decreased to 87 million metric tons in 2022 from an estimated 87.12 million metric tons in 2021. Over 100% more eggs are produced worldwide now than there were in 1990.
Egg Protein Is High-Quality
Eggs contain all nine essential amino acids, making them a complete protein source.
Egg Size Depends on Hen Age
Older hens typically lay larger eggs than younger hens.
Double Yolks Are Rare
About 1 in 1,000 eggs contains two yolks, usually laid by young hens.
Eggshells Are Recyclable
Crushed eggshells can be used in compost or as a natural fertilizer.
Eggs Contain Every Vitamin Except C
Eggs are packed with nutrients, except for vitamin C.
Hard-Boiled Eggs Spin Easily
A cooked egg spins smoothly, while a raw egg wobbles due to the liquid inside.
Eggshells Can Be Used for Art
Eggshells are used in crafts, such as mosaics and decoration.
Yolk Stays in the Center of Fresh Eggs
The fresher the egg, the more centered the yolk stays when cracked.
Eggs Have Multiple Membranes
Between the shell and egg white, there are two protective membranes.
Hens Can Lay Over 300 Eggs a Year
A single hen can lay up to 300–325 eggs annually.
Eggs Can Be Stored for Weeks
Properly refrigerated, eggs can last up to 5 weeks.
Eggs Are Used in Vaccines
Eggs play a key role in producing some vaccines, like flu vaccines.
Eggs Symbolize New Life
In many cultures, eggs are symbols of rebirth and fertility.
Ostrich Eggs Are the Largest
One ostrich egg equals about 24 chicken eggs in size.
Largest chicken egg ever
In Vineland, New Jersey, USA, on February 25, 1956, a White Leghorn hen lay an egg weighing 454 g (16 oz) with a double yolk and double shell.
Time Takes for a chicken to lay egg
A hen needs 24–26 hours to lay one egg.
Largest Egg Producer country
With about 462 billion eggs produced annually, China is the world’s largest egg producer.
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