Parsnips have a strong taste and with their pale skin, they look like carrots who have seen a ghost. But despite these characteristics, parsnips are full of healing power. They are excellent sources of folate, fiber and phenolic acids which have been shown wpsfresno to help block cancers. One cup cooked parsnips contains almost grams of fiber which is 28 percent of the Daily Value. A little bit more than half of the fiber in parsnips is of the solu ble type which means that it becomes gel.