Eat or Avoid
E170

Calcium Carbonate

Also known as: Chalk, Limestone, Aragonite, Calcite

ColorantsAcidity RegulatorsAnti-caking AgentsLeavening AgentsStabilizers

Safety rating

Generally Safe

Eat Away!Generally SafeUse SparinglyAvoid

Purpose and Function

Calcium Carbonate is a naturally occurring mineral used as a leavening agent in baking, a stabilizer and anti-caking agent in dairy and processed foods, a whitening agent in confectionery, and a calcium-fortification supplement.

Commonly found in

  • Bread, cakes, and pastries
  • Cheese, milk powder, and non-dairy creamers
  • Candies and chewing gum
  • Calcium supplements

Key functions

  • Acts as a leavening agent
  • Stabilizes and prevents caking
  • Fortifies foods with calcium

Potential Risks and Side Effects

  1. 01Overconsumption, particularly via supplements, may cause hypercalcemia — kidney stones, digestive issues, impaired absorption of magnesium/zinc
  2. 02Naturally occurring in the body, so generally well tolerated with no significant allergy risk
  3. 03Mild digestive discomfort possible at excessive supplement intake

References

    Related Additives