Dehydrated ingredients are foods that have had their moisture removed, which helps to preserve them for longer periods. This process can involve air drying, freeze drying, or using heat. Common dehydrated ingredients include fruits, vegetables, and herbs, which retain most of their nutrients and flavors despite the lack of water. These ingredients are often used in cooking and baking, as they can be easily rehydrated by soaking in water or added directly to dishes. Dehydrated foods are lightweight and convenient, making them popular for camping, hiking, and emergency food supplies. They are also a staple in many cuisines around the world.