✔Dehydrated vegetables retain 100 percent of the calorie content of fresh vegetables while only taking up half of the space.
✔Current dehydration technology can remove almost all of the moisture content in vegetables, leaving only 2 percent to 3 percent in the finished product. The removal of moisture also increases the storage life of the vegetables.
✔Drying vegetables is a safe, low-fat and long-lasting method of preserving them. One of the greatest benefits is that the nutritional content of dehydrated veggies is left relatively unchanged.
✔Dehydration preserves the full dietary fiber content of the vegetables, ensuring they remain a high-fiber food choice. Dietary fiber provides bulk to your diet and can help reduce the effects of constipation. Vegetables are naturally high in fiber, both soluble and insoluble; the former helps create soft bulk, while the latter helps speed up the passage of waste through your bowels.
Reference:
https://www.livestrong.com/article/340760-nutritional-value-of-dehydrated-vegetables/