URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Grapefruit, raw, white, Florida, 1 cup sections, with juice Protein (g) 1.45 Total lipid (fat) (g) 0.23 Carbohydrate, by difference (g) 18.84 Energy (kcal) 73.6 Calcium, Ca (mg) 34.5 Iron, Fe (mg) 0.12 Magnesium, Mg (mg) 20.7 Phosphorus, P (mg) 16.1 Potassium, K (mg) 345 Sodium, Na (mg) 0 Zinc, Zn (mg) 0.16 Copper, Cu (mg) 0.13 Manganese, Mn (mg) 0.03 Vitamin A, IU (IU) 23 Retinol (mcg) 0 Vitamin C, total ascorbic acid (mg) 85.1 Thiamin (mg) 0.09 Riboflavin (mg) 0.05 Niacin (mg) 0.46 Pantothenic acid (mg) 0.65 Vitamin B-6 (mg) 0.1 Folate, total (mcg) 20.7 Vitamin B-12 (mcg) 0 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 20.7 Cholesterol (mg) 0 Fatty acids, total saturated (g) 0.03 Fatty acids, total monounsaturated (g) 0.03 Fatty acids, total polyunsaturated (g) 0.06