Dehydrated vegetables are generally considered to retain some of the nutrients, and the freeze-drying process retains a fuller range of nutrients compared to the deep-frying process, but consumption of fresh vegetables is still recommended. 1. Frying process. Vacuum deep-frying is used to remove water from fresh vegetables, and this is the process of deep-frying to make vegetable packets. For this process, the loss of many vitamins is more serious, while nutrients such as dietary fiber are retained. 2. Freeze-drying process. Freeze-drying process refers to the freeze-drying environment, fresh vegetables in the water directly sublimation so as to achieve the purpose of dehydration. The nutrients retained by this process are more comprehensive, vitamins, dietary fiber, etc. can be retained in a more perfect way. In summary, the nutritional value retained by different dehydration processes is different, but in general can leave part of the nutrients. However, if possible, we should still try to eat fresh vegetables as the main, not only can fully obtain a variety of nutrients, but also to replenish water.