E302 – Calcium Ascorbate

Danger Level: 0 (Safe)

E302, known as calcium ascorbate, is the calcium salt of ascorbic acid (vitamin C). It is commonly used in the food industry for its antioxidant properties and as an acidity regulator. 

Purpose in Products

Calcium ascorbate serves several functions in food products:

  • Antioxidant: Prevents oxidation, thereby extending shelf life and preserving color and flavor. 
  • Acidity Regulator: Maintains the desired pH level in various food items.
  • Color Stabilizer: Inhibits the formation of nitrosamines in meat products and prevents browning in fruits and vegetables.

Health Considerations

Calcium ascorbate is generally recognized as safe and serves as a source of vitamin C. However, excessive intake may lead to:

  • Digestive Discomfort: High doses can cause diarrhea or stomach cramps. 
  • Calcium Intake: Individuals with certain health conditions should monitor their calcium intake to avoid potential complications.

Impact on Children

Calcium ascorbate is safe for children and contributes to their vitamin C intake, supporting growth and immune function. However, moderation is key to avoid excessive calcium consumption.

Impact on Taste

At typical usage levels, calcium ascorbate does not impart any noticeable taste to food products. In higher concentrations, it may have a slightly bitter flavor. 

Compatibility with Other Additives

Calcium ascorbate is compatible with most food additives and can work synergistically with other antioxidants to enhance preservative effects. However, in the presence of certain compounds, such as benzoates, it can lead to the formation of benzene, a potential carcinogen, under specific conditions. Therefore, careful formulation is necessary to prevent such interactions.

Natural Occurrence

Calcium ascorbate does not occur naturally but is derived from ascorbic acid, which is abundant in various fruits and vegetables, including:

  • Citrus Fruits: Oranges, lemons, limes.
  • Berries: Strawberries, raspberries.
  • Leafy Greens: Spinach, kale.
  • Tomatoes
  • Broccoli

Alternatives and Substitutes

While calcium ascorbate is a common antioxidant, alternatives include:

  • Ascorbic Acid (E300): Pure form of vitamin C used similarly in food preservation.
  • Sodium Ascorbate (E301): A sodium salt of ascorbic acid, used as an antioxidant and a source of vitamin C.
  • Citric Acid (E330): Used as an acidity regulator and antioxidant.

Regulation

Calcium ascorbate (E302) is approved for use as a food additive globally, including in the European Union, the United States, Canada, Australia, and New Zealand. It is generally recognized as safe (GRAS) and is permitted in various food products without specific maximum limits, except in certain cases like infant formula, where the addition is regulated to ensure safety. 

Conclusion

E302 (Calcium Ascorbate) is a safe and effective antioxidant and acidity regulator widely used in the food industry. Its inclusion in food products helps preserve quality and extends shelf life without adverse health effects when consumed within recommended dietary allowances.