Start by washing the eggshells thoroughly to remove any egg residue. Boil them in water for about 10 minutes to kill bacteria like Salmonella.
Once boiled, let them dry completely — either air-dry on a clean towel or bake them at a low temperature (around 200°F / 93°C) for 10–15 minutes until crisp.
After drying, use a blender, coffee grinder, or mortar and pestle to crush the shells into a fine powder. The finer the powder, the easier it is for your body to absorb the calcium.
2. Easy ways to eat crushed eggshells
You can add the powdered eggshells to your favorite foods without changing the taste. Try mixing a small pinch (about ½ teaspoon) into smoothies, oatmeal, yogurt, or soups. You can also stir it into baked goods or sprinkle it over salads.
Just remember, a little goes a long way. Too much calcium can be hard on your kidneys, so moderation is key.
3. Nutrients for the soil
If you don’t want to eat your crushed eggshells, there are still plenty of other things you can do with them.
Eggshells are broken down quickly, and can supply many nutrients to the soil. Amongst other things, the shells contain valuable calcium and other minerals. If you have enough eggshells, you can really enrich your soil.
4. Soothe skin irritation
Crush some eggshells with a mortar and pestle, then add a bit of apple cider vinegar and let the mixture sit for a few days. The calcium-rich solution makes a classic home remedy that can help calm and soothe minor skin irritations.
