E528 — Magnesium Hydroxide

Magnesium hydroxide (E528) is an inorganic compound commonly used in the food industry as an acidity regulator and stabilizer. It appears as a white powder and is derived from natural minerals. 

Danger Level: 0 — Safe

Purpose in Products

In the food industry, magnesium hydroxide serves several functions:

  • Acidity Regulator: It adjusts the pH levels in food products, ensuring proper acidity. 
  • Stabilizer: Magnesium hydroxide stabilizes the color of vegetables during canning, maintaining their visual appeal.
  • Enhancer in Cheese Production: It enhances the action of rennet in cheese production, improving curd formation.

Health Considerations

Magnesium hydroxide is considered safe for consumption when used within established limits. The European Food Safety Authority (EFSA) has not specified an acceptable daily intake (ADI) for magnesium hydroxide, indicating no safety concern at the reported uses and use levels. 

Impact on Children

Magnesium hydroxide is safe for children when present in food products at the levels typically used in food processing.

Impact on Taste

Magnesium hydroxide is tasteless and odorless, making it an ideal ingredient for various food products without altering their flavor profiles.

Compatibility with Other Additives

Magnesium hydroxide is compatible with various other food additives, including sugars and other hydrocolloids. Its water-binding properties make it suitable for use in products requiring moisture retention.

Natural Occurrence

Magnesium hydroxide is not naturally occurring in foods but is synthetically produced for use as a food additive.

Alternatives and Substitutes

For those seeking alternatives to E528, options include:

  • Calcium Hydroxide (E526): Used as an acidity regulator and firming agent.
  • Sodium Hydroxide (E524): Commonly used as an acidity regulator in various food products.

Regulation

Magnesium hydroxide is approved for use as a food additive in many countries, including the European Union, where it is designated as E528. Regulatory bodies such as the European Food Safety Authority (EFSA) have evaluated its safety and concluded that it poses no health concerns when used within established limits. 

Conclusion

Magnesium hydroxide (E528) is a versatile and safe food additive used primarily as an acidity regulator, stabilizer, and enhancer in cheese production. Its unique properties make it valuable in various food products, enhancing texture and stability. While generally safe, individuals with specific sensitivities should exercise caution.