Dried dates contain a lot of iron. Iron deficiency is common, and many people who are iron deficient in their diets are prone to fatigue. The combination of high iron content and carbohydrates in dried dates can provide helpful energy. On average, dates contain 21% water, 75% carbohydrates (63% sugars, 8% dietary fiber), 2% protein and less than 1% fat. A 100-gram (3+½ oz) serving of dates provides 1,180 kilojoules (280 kcal) of dietary energy and consists of pantothenic acid, vitamin B6, and the dietary minerals magnesium, . manganese, potassium and low doses with other micronutrients. Glucose makes up 55% of the sugar in dates, while fructose makes up 45% and sucrose is negligible. 2011 study showed that the glycemic index (GI) of five different days from 46–55, While the 2002 report showed GI values ​​ranging from 31–50, the results show that sleep is the lowest GI food source. Like many other fruits, dates contain measurable amounts of calcium oxalate.