What Is Calcium Propionate?
Calcium propionate is a preservative. The FDA's regulation, 21 CFR 184.1221, affirms it as generally recognized as safe as a direct food ingredient based on its use as an antimicrobial agent, used with no limitation other than current good manufacturing practice in foods including baked goods and cheeses. The FDA defines antimicrobial agents as substances that preserve food by preventing the growth of microorganisms and subsequent spoilage, including mold and rope inhibitors.
Bread is its main use. A 2002 technical review for the USDA National Organic Program quotes a source saying propionates act against molds and rope bacteria with almost no effect on yeast, making them a good fit for products made with commercial yeast, and that they are used mainly as mold and rope inhibitors in bread. The FDA's standard for bread, rolls and buns says calcium propionate used as a preservative is not subject to the limit it sets on yeast nutrients and calcium salts.
The Joint FAO/WHO Expert Committee on Food Additives maintained in 1997 a group acceptable daily intake of "not limited" for propionic acid and its calcium, potassium and sodium salts, first set in 1973.
Sources checked September 15, 2026. Every point below links the page it came from.
The sources behind this answer
- Regulatory filingUnder 21 CFR 184.1221, calcium propionate is affirmed as generally recognized as safe based on its use as an antimicrobial agent, with no limitation other than current good manufacturing practice. US FDA, 21 CFR 184.1221 (eCFR) ↗
- Regulatory filingThe calcium propionate regulation lists the foods it is used in at levels not exceeding good manufacturing practice, beginning with baked goods and cheeses. US FDA, 21 CFR 184.1221 (eCFR) ↗
- Regulatory filingThe FDA defines antimicrobial agents as substances used to preserve food by preventing growth of microorganisms and subsequent spoilage, including mold and rope inhibitors. US FDA, 21 CFR 170.3 (eCFR) ↗
- Regulatory filingThe FDA standard for bread, rolls and buns says calcium propionate used as a preservative is not subject to the quantity limit set for yeast nutrients and calcium salts. US FDA, 21 CFR 136.110 (eCFR) ↗
- Government sourceA 2002 USDA National Organic Program review quotes a source saying propionates act against molds and rope bacteria with almost no effect on yeast, and are used mainly as mold and rope inhibitors in bread. USDA Agricultural Marketing Service ↗
- Government sourceJECFA maintained in 1997 the 1973 group acceptable daily intake of not limited for propionic acid and its calcium, potassium and sodium salts. JECFA, World Health Organization ↗
Sources checked September 15, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.