Cauliflower is low in fat, low in carbohydrates and high in dietary fiber, folate, water, and vitamin C, possessing a high nutritional density.Cauliflower contains several phytochemicals, common in the cabbage family, that may be beneficial to human health, as well as carotenoids.auliflower is low in fat, low in carbohydrates and high in dietary fiber, folate, water, and vitamin C, possessing a high nutritional density.