Food-grade magnesium oxide has various uses in the food industry, primarily including regulating acidity and alkalinity, increasing expansion, preventing caking, supplementing magnesium, providing antioxidant effects, and aiding digestion.
1. Regulating Acidity and Alkalinity
Magnesium oxide can neutralize acidic substances in food and adjust the pH level, which is crucial for maintaining the taste, flavor, and stability of food. For example, adding magnesium oxide to dairy products such as milk powder and cheese, or to condiments like beverages, sauces, and salad dressings, can enhance food stability and extend shelf life.
2. Increasing Expansion
In baked goods, magnesium oxide can react with acidic components to produce carbon dioxide gas, thereby increasing the expansion of the food. This not only improves the volume and texture of baked goods like bread and cakes but also makes them softer and more palatable.
3. Preventing Caking
Magnesium oxide can be used as an anti-caking agent to prevent food from clumping during storage and use. Its hygroscopic properties allow it to absorb excess moisture in food, maintaining its flowability and looseness. For instance, adding an appropriate amount of magnesium oxide to foods like fruit jams and salt can effectively prevent caking and improve product quality and user experience.
4. Supplementing Magnesium
Magnesium is one of the essential trace elements for the human body, involved in the activation of various enzymes and the release of neurotransmitters. It is vital for maintaining the normal functions of the heart, muscles, and nervous system. As a source of magnesium supplementation, magnesium oxide can be added to food to help people compensate for potential deficiencies in their daily diet.
5. Antioxidant and Digestive Aid
Magnesium oxide contains high concentrations of oxidative components, which help resist oxidation reactions in food and extend its shelf life. Additionally, magnesium oxide can neutralize stomach acid, alleviate acid reflux, promote intestinal peristalsis, and aid digestion.