Quick Answer
Dehydrated foods generally retain high nutritional value, especially when dehydrated using low-temperature methods that preserve the natural enzymes and vitamins found in the food.
Nutrient Retention Methods
Dehydrating food at low temperatures (95°F - 105°F or 35°C - 40°C) and high air flow can help preserve nutrients. This method, called “dehydration with air flow,” can retain up to 70-80% of the original vitamin C content in fruits and vegetables. For instance, dehydrating strawberries at 100°F (38°C) for 6-8 hours can preserve 80% of their original vitamin C.
Food Selection and Preparation
Not all foods are suitable for dehydration, especially those high in water content or those that are prone to oxidation. Foods like leafy greens, herbs, and vegetables with a high water content can be dehydrated to retain their nutrients. However, it’s essential to prepare these foods properly before dehydration, such as by blanching or marinating, to inactivate enzymes that can degrade nutrients.
Storage and Rehydration
To retain nutritional value, it’s crucial to store dehydrated foods properly, away from light, heat, and moisture. Dehydrated foods can be stored for up to 6-12 months in airtight containers. When rehydrating, use cold water to minimize nutrient loss and allow the food to rehydrate for an extended period to ensure even rehydration.
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