Dehydration

Definition

Removal of water from food using heat (air drying, oven, dehydrators) to inhibit microbial growth and extend shelf life. Reduces water content to 10-20%.

How it works

Dehydration removes moisture using gentle heat (40-70°C in commercial dehydrators) or higher temperatures (60-90°C in ovens), inhibiting bacterial and mold growth that require water. This concentrates flavors and nutrients per unit mass while reducing weight and volume for convenient storage. Unlike freeze-drying, traditional dehydration may cause some nutrient loss and texture changes due to higher heat exposure. The process is economical and widely used for fruits, vegetables, herbs, and meat products.

Role

Extends food shelf life while concentrating flavors and nutrients, making foods lightweight and convenient.

Examples

• Dried fruits
• Beef jerky
• Sun-dried tomatoes
• Dried herbs
• Dried mushrooms

Recommendations

Use temperatures of 50-70°C for vegetables to preserve nutrients. Dry until brittle or leathery depending on desired texture. Store in airtight containers away from light and heat.

Key takeaway

Dehydration extends shelf life while concentrating flavors through moisture removal.

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