Boil Eggshells and Discover a Natural, Safe Source of Calcium
Eggs are one of the most popular and nutritious foods worldwide, offering a rich source of high-quality protein, vitamins, and minerals. However, most people discard the eggshells without realizing that they are also a valuable source of nutrition—especially calcium.
Recent research and food-science studies have shown that eggshells can be safely prepared and consumed in powdered form as a natural calcium supplement, provided they are properly cleaned, boiled, and ground. Let’s explore the verified facts about eggshells, their composition, potential benefits, and the right way to use them safely.
What Are Eggshells Made Of?
According to the U.S. Department of Agriculture (USDA) and studies published in the International Journal of Food Sciences and Nutrition, eggshells are composed of approximately 95% calcium carbonate (CaCO₃). The remaining 5% includes magnesium, potassium, phosphorus, zinc, iron, and small amounts of organic compounds such as proteins and collagen-like components.
Each eggshell contains about 2 grams of calcium, nearly twice the daily calcium requirement for an adult, according to the National Institutes of Health (NIH). Calcium is essential for building and maintaining strong bones and teeth, regulating muscle function, nerve signaling, and supporting cardiovascular health.
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