Daikon has a decent amount of nutrients. Contrary to popular belief, it's not high in fiber but daikon is high in potassium–per 1 cup, it contains 263 milligrams of potassium (about 75% of the amount in a banana) and 25.5 milligrams of vitamin C (about half the amount of an orange). It also contains smaller amounts of folate, calcium, magnesium and phosphorus.