What Preservatives Keep Bread From Molding?

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Fresh bread can soon become moldy without the use of preservatives.
Fresh bread can soon become moldy without the use of preservatives. (Image: Thomas Northcut/Photodisc/Getty Images)

Bread is high in sugars and moisture, therefore it develops mold quickly. Most preservatives used for bread occur naturally, however some people react negatively to certain preservatives, just as some react to certain foods. Preservatives do not kill all bacteria in food, they merely inhibit the growth of mold and toxins. Without preservatives, many tons of bread and other foods would be wasted each year.

Mycotoxins

Moldy bread can produce mycotoxins that can make you sick, so preservatives are often used to inhibit mold growth. Mycotoxins occur mostly in grains and nuts, but they can also occur on celery, grape juice and apples. Approximately 25 percent of world crops are affected by mycotoxins.

Sorbic Acid

Sorbic acid occurs naturally in rowanberries and mountain ash berries. It is the active ingredient in sorbic acid and potassium sorbate, both of which are used to preserve tortillas and other unleavened breads. Sometimes it is sprayed on the surface of the food to inhibit mold growth. Sorbic acid inhibits yeast fermentation so it is not used in yeast-leavened breads.

Sorbic acid is sometimes used to inhibit mold growth on tortillas.
Sorbic acid is sometimes used to inhibit mold growth on tortillas. (Image: Jupiterimages/Photos.com/Getty Images)

Sodium Benzoate

Sodium benzoate is the sodium salt of benzoic acid and it exists naturally in cranberries, prunes, greengage plums, cinnamon, cloves and apples. It also occurs in vinegar, which is often used in preservative-free breads. Preserves, pickles, sauces and salad dressings are mostly preserved with sodium benzoate.

Calcium Propionate

Calcium propionate inhibits the mucoid variant of bacillus subtilis and mold development in bread. Bacillus subtilis has been linked to outbreaks of food poisoning. Calcium propionate also adds extra calcium to the bread. Calcium propionate works well in yeasted bread, as it does not inhibit yeast fermentation.

Reactions

All preservatives mentioned here are approved by the FDA, and are considered safe for human consumption if used in the correct amounts. According to the Food Intolerance Network, a number of people report negative reactions to calcium propionate. Reactions include eczema, nasal congestion, irritability and inattention and it has even been linked to ADD in children.

Natural Alternatives

Add a teaspoon of honey to your bread while you mix it, as this helps to inhibit the growth of mold. Along with natural preservatives such as vinegar and honey, there are other ways to preserve your fresh bread. Start by letting it cool completely before storing it in a bread crock. Freezing fresh, unpreserved bread helps keep it fresh longer.

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