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How does humidity affect the storage of foods with high water content?

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Plate of sushi rolls with salmon, vegetables, and rice wrapped in seaweed, served with chopsticks and a small bowl of soy sauce on a wooden table. — gastronomy A common rice dish of Japanese cooking is sushi. To make a type known as *maki-zushi*, a sheet of seaweed is spread with rice flavored with vinegar. Seafood or vegetables and garnishes are then placed on top. Finally, the whole sheet is rolled into a cylinder and sliced.

For foods with high water content, maintaining a high-humidity environment during storage is essential to prevent the excessive loss of moisture.1

When these foods are stored in environments with insufficient humidity, they lose water to the surrounding air, which can lead to undesirable changes in quality, such as loss of texture, development of off-flavours, and alterations in colour. While temperature is the most critical factor in minimizing reaction rates and preserving nutrient content, humidity control acts as a vital safeguard for maintaining the physical integrity of high-moisture products.1

In contrast, foods that are not high in water content or those that have undergone dehydration are managed differently, as their stability often depends on controlling water activity to prevent microbial contamination and enzymatic deterioration.2