Cauliflower is high in Choline, Sulfur, Vitamin C & Potassium! Cauliflower’s best nutritional aspect is the high daily value of vitamin C it delivers in one serving – an impressive 77%. Cauliflower is also a good source of vitamin K, thiamin, riboflavin, niacin, B6, folate, pantothenic acid, magnesium, manganese, phosphorus and fiber. Cauliflower also contains numerous phytonutrients, such as indole-3-carbinol and sulforaphane that may help prevent prostate, ovarian, and cervical cancers.