Why you should never throw away eggshells

In most households, throwing away egg shells after boiling the eggs is a common practice, but what if we tell you that much like eggs, shells also contain nutrients that can be used in so many useful ways. Here's why you should never throw away eggshells.
Nutrient-rich
Eggshells consist mostly of calcium carbonate, a compound of great value to plant development. When crushed and used at the base of plants, eggshells enrich the soil by providing calcium, which is essential in the prevention of blossom end rot in peppers and tomatoes and other vegetables. They also aid in soil structure enhancement by promoting the disintegration of heavy clay soils, thus enhancing drainage.

Fertilizer
Eggshells also naturally function as a fertilizer for your garden. Eggshell calcium aids the development of hard cell walls in plants, which is supportive of growth health. Eggshells include other trace minerals such as magnesium and phosphorus that are supportive of other stages of growth in the plant. Just grind up the eggshells and blend them with your garden bed or compost heap for a surprise infusion of nutrition.
Pest Control
Eggshells are also an effective, natural pest deterrent. The sharp tips deter slugs and snails, soft-bodied insects, from crawling over them. Simply scatter ground-up eggshells at garden borders or around plant perimeters, and these pests will not touch them, shielding your plants from harm.

Compost
If you are composting kitchen trash, eggshells make great additions. They break down comparatively slowly, contributing structure to the compost pile. Their calcium is also a means of balancing the compost's pH level to that of being neutral. Once broken down, they leave the resulting product with loads of nutrients so that your finished compost is both nutrient-rich and ready to fertilize your garden.
Natural cleaning agent
Actually, eggshells can even be employed for cleaning. Crushed eggshells are coarse enough to be a effective pot and pan scrubber. It works best on grime and greasy foods. Mix crushed eggshells with water to form a paste and rub clean. It is easy on the surface but hard on grime.
Calcium
Ground eggshells may even be taken as a calcium supplement to add to calcium consumption. Eggshells are a natural, bioavailable source of calcium, which supports bone structure, muscle function, and overall health. Well-cleaned, ground eggshells can be added to smoothies, baked products, or used as a natural calcium supplement sprinkled over food.
Pet food
Other than applying them to gardens, eggshells can also benefit your pets. Crushed eggshells can be added to pet food as an excellent source of calcium for animals like chickens and dogs. The calcium will provide healthy bones and teeth, and it can help with egg-laying in hens. Just grind them thoroughly so there are no sharp edges.