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Moisture content is a critical factor in food preservation. Foods with high water content are more prone to spoilage from microorganisms and enzymatic activity. Reducing moisture can be achieved through dehydration (drying) or by increasing solute concentration, both of which decrease water availability for microbial growth.123

Dehydration has been used for centuries, with advancements during World War II expanding its application to various food products like fruits, vegetables, and meats. While dehydration can preserve nutrients, some vitamins, like Vitamin C and B vitamins, may be lost. Pathogenic bacteria can sometimes survive in dried foods, posing a risk of food poisoning upon rehydration if not properly handled. Proper sanitation, pasteurization before drying, and protective packaging are essential to maintain the safety and quality of dried foods.1

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