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E170 (Calcium Carbonate)

Calcium carbonate used as a leavening agent in baking to release carbon dioxide and help dough rise.

Mineral or nutrientUpdated Feb 14, 2026
Health score+1.0
-5Good5

Water guidelines

Legal limit
Not specified
Health guideline
Not specified

Food and supplement guidelines

Legal limit
Not specified
Health guideline
Not specified

Risks

Inhalation risk as fine dust, possible mild irritation on respiratory tract in occupational exposure, excessive ingestion may cause digestive upset

Benefits

Leavening agent aiding dough expansion, source of dietary calcium

References

Waters containing E170 (Calcium Carbonate)

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