Food dehydration is a preservation method that removes moisture from food, inhibiting the growth of bacteria, yeast, and mold. This process extends the shelf life of fruits, vegetables, and meats while retaining their nutrients and flavors. Common techniques include using a dehydrator, an oven, or air drying. Dehydrated foods are lightweight and easy to store, making them popular for camping, hiking, and emergency supplies. They can be rehydrated by soaking in water or cooking, allowing for versatile meal preparation. Popular dehydrated foods include raisins, dried tomatoes, and jerky.