Calcium Carbonate (E170) — What You Need to Know
What Is Calcium Carbonate?
Calcium Carbonate is a common naturally occurring mineral found in chalk, limestone, and marble. In food applications, it serves as a white coloring agent, acidity regulator, anti-caking agent, and calcium fortifier. It is one of the most widely used food additives and dietary supplements worldwide.
What Is It Used For?
Used as a white food coloring, flour fortifier, acidity regulator, and calcium supplement in baked goods, dairy products, and confectionery. Also widely used in antacids and calcium supplements.
Safety Assessment
One of the most common minerals on Earth. Used as both a food color (white) and a calcium supplement. Essential nutrient — recommended daily calcium intake is 1000-1200mg for adults. EFSA classifies as quantum satis (no safety limit). Upper tolerable intake level for calcium from all sources set at 2500 mg/day for adults. No safety concerns when used as a food additive. Also used in flour fortification in the UK (mandatory since 1953).
Based on current evidence, Calcium Carbonate is rated Safe with a score of 10/10. This is 4.2 points above the average for colorings (5.8/10). Last reviewed by regulators: 2011.
Commonly Found In
Always check the label for E170 or 'Calcium Carbonate'
▶Chemical Information
Frequently Asked Questions about Calcium Carbonate
Quick Facts
- E-Number
- E170
- INS Number
- 170
- Category
- Colorings
- Origin
- Natural
- FDA Status
- GRAS (Generally Recognized as Safe)
- EFSA Status
- Quantum satis — considered safe, no numerical limit as a food additive
- ADI
- Not specified (quantum satis) mg/kg bw/day
- Last Review
- 2011
Related Additives
Other colorings in the same family