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Calcium carbonate is a white, odorless powder that is virtually tasteless. It's a common naturally occurring mineral, found in limestone and chalk. In culinary applications, it acts as a firming agent, dough strengthener, and color stabilizer. You might also find it in dietary supplements as a source of calcium.

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Calcium carbonate supplements should be stored in a cool, dry place away from direct sunlight and moisture. Keep the container tightly closed to prevent humidity from affecting the product. It is generally safe to store at room temperature. Always check the expiration date before use.