URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Grapefruit, raw, pink and red, California and Arizona, 1 fruit (3-3/4" dia) Protein (g) 0.62 Total lipid (fat) (g) 0.12 Carbohydrate, by difference (g) 11.92 Energy (kcal) 45.51 Calcium, Ca (mg) 13.53 Iron, Fe (mg) 0.1 Magnesium, Mg (mg) 11.07 Phosphorus, P (mg) 14.76 Potassium, K (mg) 180.81 Sodium, Na (mg) 1.23 Zinc, Zn (mg) 0.09 Copper, Cu (mg) 0.04 Manganese, Mn (mg) 0.02 Vitamin A, IU (IU) 318.57 Retinol (mcg) 0 Vitamin C, total ascorbic acid (mg) 46.86 Thiamin (mg) 0.04 Riboflavin (mg) 0.02 Niacin (mg) 0.23 Pantothenic acid (mg) 0.35 Vitamin B-6 (mg) 0.05 Folate, total (mcg) 14.76 Vitamin B-12 (mcg) 0 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 14.76 Cholesterol (mg) 0 Fatty acids, total saturated (g) 0.02 Fatty acids, total monounsaturated (g) 0.02 Fatty acids, total polyunsaturated (g) 0.03