1. Nutritional Supplement: Calcium carbonate is a common calcium supplement widely used in fortified foods to help meet daily calcium requirements, which is especially important for populations with higher calcium needs, such as children, pregnant women, and the elderly. Calcium is essential for the health of bones and teeth and helps prevent osteoporosis and other diseases related to calcium deficiency.
2. Anti-Caking Agent: Maintaining Flowability: Calcium carbonate is often used as an anti-caking agent in powdered foods (such as salt, sugar, and spices) to help prevent clumping between particles, thereby maintaining the flowability of powdered products. This can enhance the operability and user experience of the product.
3. Acid Regulator: Neutralizing Acidity: Calcium carbonate can serve as an acid regulator, capable of neutralizing excess acidity in foods, improving flavor, and stabilizing the pH of the product. It can help balance acidity in certain formulations.
4. Thickener and Stabilizer: Improving Texture: In some dairy products and beverages, calcium carbonate can act as a thickener, enhancing the mouthfeel and texture of the food, and it is also an important component for the viscosity and stability of certain formulations.
5. Leavening Agent: Gas Release: In certain baked goods, calcium carbonate can react with acidic components (such as vinegar or lemon juice) to release carbon dioxide, providing leavening effects that positively influence the fermentation and texture of the dough.
6. Colorant or Filler: Enhancing Appearance: In some processed foods, calcium carbonate is commonly used as a filler to help improve the appearance of the food, enhance color, and increase the visual appeal of the product.

7. Bioactivity: Promoting Digestion: Some studies suggest that calcium carbonate may improve digestion and nutrient absorption, promoting intestinal health.

8. Food Packaging Materials: Sustainability: Calcium carbonate can also be used to manufacture biodegradable food packaging materials, helping to reduce environmental pollution and aligning with modern sustainable development goals.