This opening sentence sounds like a typical clickbait headline from an online article about gardening, DIY, or health. The text usually continues with tips on reusing eggshells instead of throwing them in the trash.

If you’re wondering what’s behind this incomplete headline, here are the most common and worthwhile uses for boiled eggshells:

No more garden pests
Coarsely crushed eggshells scattered around your flower beds create an excellent natural barrier against slugs and snails. The sharp edges of the shells prevent them from moving, so your plants remain protected without chemicals.

No more expensive fertilizers
Eggshells are almost 100% calcium carbonate (CaCO₃).

For plants: Finely ground eggshells mixed into the soil are ideal for tomatoes, peppers, and cucumbers, which are sensitive to calcium deficiency (this prevents stem rot).

For chickens: If you keep poultry, you can mix cooked, dried, and crushed eggshells into their feed. This provides the animals with the calcium they need to form new, strong eggshells.

No more burnt pots!
Crushed eggshells make an excellent natural scouring agent. They are ideal for removing tea and coffee residue from hard-to-reach pots, thermoses, or vases. Simply add the shells with some warm water and a drop of spring water, and shake well.

Why should the shells be boiled first?

Boiling (or baking in the oven) is an important step in sterilization. This kills any bacteria (such as salmonella) that might be present on the surface of raw eggs, and the shells are much easier to grind into a fine powder after drying.

Did any of these tips interest you, or did you see this headline in connection with a particular recipe or household tip?