Date Nutrition Facts One date (8g) provides 23 calories, 0.2g of protein, 6g of carbohydrates, and 0g of fat. Dates are a good source of potassium, magnesium, and iron. Vitamins and Minerals Dates are a good source of potassium, magnesium, and iron. Also, dates supply six essential B vitamins, including folate and pantothenic acid. Dates also have a high concentration of polyphenols, a type of antioxidant that protects against cellular damage, and beneficial phytoestrogens.