Unlike table sugar or HFCS, fructose does not cause a rapid rise and subsequent large fall in blood glucose levels, which means it has a low glycemic load or glycemic index (GI). Glycemic index (glycemic load per gram carbohydrate) is a measure of how carbohydrates affect blood glucose concentrations. As expected, glucose itself has a high value because it is rapidly absorbed into the blood stream; its GI or glycemic load per gram is 100. In contrast, the glycemic load per gram fructose is only 19, while that of table sugar is 65 – midway between its component parts glucose and fructose. HFCS has a similar GI value to table sugar, though its precise value depends on the fructose content of the HFCS that is used.