Many people who include eggs in their diet toss away the shells without a second thought. But did you know that eggshells actually have several surprising health benefits? Most people simply aren’t aware of how valuable they can be.
What Are Eggshells, Really?
Eggshells are one of the most affordable and effective natural sources of calcium. About 95% of an eggshell is made up of calcium carbonate, with the rest containing trace minerals like magnesium, potassium, zinc, and iron — all of which play a vital role in building strong bones, teeth, and nails.
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Each shell also has three layers:
- The hard outer shell, made of calcium crystals,
- And two thin inner membranes rich in keratin proteins that protect against bacteria.
While many people get enough calcium from food, those with limited diets or food restrictions can benefit from using eggshells as a sustainable, low-cost calcium supplement.
How to Use Eggshells Safely
The best part? You don’t need to buy expensive pre-packaged eggshell powder — you can easily make it at home.
However, it’s important to remember that boiled eggshells don’t directly cure or prevent diseases. Instead, they support your overall health when used correctly.
Health Benefits of Eggshells
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1. Supports Bone Health
Eggshells are a natural and inexpensive way to strengthen your bones. Since they’re almost pure calcium carbonate, they serve as a natural alternative to commercial calcium supplements.
Research in the International Journal of Food Science and Nutrition found that powdered chicken eggshells are an effective calcium source, and some studies even suggest that our bodies may absorb calcium from eggshells better than from synthetic pills.
2. May Reduce the Risk of Osteoporosis
As we age, our bones gradually lose density. Maintaining proper calcium levels helps slow that process. In one study, people who took eggshell membrane powder showed improved bone density — suggesting it could help reduce the effects of osteoporosis naturally.
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3. Boosts Collagen Production
Those thin inner membranes in eggshells are rich in collagen, the protein responsible for keeping our skin firm and our joints flexible. Since collagen production declines with age, adding eggshell membrane extracts to your diet may help support smoother skin and better joint health.
4. Strengthens Teeth
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Teeth, like bones, need calcium to stay strong. Finely ground eggshell powder can help remineralize enamel and reduce tooth sensitivity. Some natural toothpaste brands already use eggshell powder for these benefits. Regular use may help protect against decay and promote a brighter, healthier smile.
Safety Tips and Precautions
While eggshells offer several benefits, it’s essential to handle them correctly:
- Always boil eggshells before using them to kill any bacteria, such as Salmonella enteritidis.
- Grind them into a fine powder before consuming. Swallowing large pieces can irritate your throat or digestive tract.
- Though natural calcium sources may contain trace heavy metals like lead or cadmium, studies show that eggshells usually have much lower levels compared to alternatives such as oyster shells.
When prepared properly, they’re a safe, natural, and reliable calcium source.
Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider or a registered dietitian before changing your diet, especially if you have existing medical conditions or are at risk for cancer or other illnesses.
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