What is food dehydration? Dehydrating food is a way of heating it to remove most of the water content, reducing the weight to approximately 25% of its original weight. The foods retains almost as many nutrients as when it was picked and you can enjoy for a much longer period. You can dehydrate virtually any food using our Stockli Dehydrator, including fruit and vegetables, meat and tofu. Dried food is lightweight, nutritious, compact for storing and most of all tastes as delicious as ever.