Do Reclosable Bags Help Prevent Food Mold?

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Reclosable bags are a staple in kitchens around the world. They come in different sizes for various needs, but the most familiar size is a sandwich bag. Reclosable bags tightly close with a zipper-like seal that locks out air from the food inside.

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Function

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Foods prone to mold, such as bread, can have a longer shelf life when placed inside a reclosable bag and properly sealed. Mold needs oxygen to grow; therefore, the more air removed from the bag the less likely mold will form. Reclosable bags also prevent airborne food spores from the food since they cannot penetrate the plastic bag.

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Warning

While reclosable bags can keep foods fresher longer, they cannot stop mold from forming because mold spores are present on food before it is placed inside the bag. Reclosable bags can only help prolong freshness. Safe food handling procedures should always be followed no matter what type of bag or container food is stored.

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Considerations

Refrigerated foods keep fresher longer than food left at room temperature and freezing will stop mold from growing. Once frozen food is thawed the molding process will begin again because freezing does not kill the spores.

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