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Eggshells are made up of nearly 90% calcium carbonate, the same compound found in agricultural lime and many commercial soil treatments. They also contain trace minerals like magnesium, potassium, and phosphorus. When eggshells are boiled, these minerals slowly leach into the water, creating a mild, natural solution that can be reused in surprising ways around the home.

Most people don’t realize that throwing eggshells away is essentially tossing out a free resource.

The Common Problem Boiled Eggshells Can Help With

One of the most widespread household issues—especially for