Fructose and glucose are both monosaccharides, but the body metabolizes these sugars differently. For example, glucose stimulates insulin release from the pancreas (see section 28.4); fructose does not. Moreover, insulin stimulates leptin release. Finally, fructose is more likely than glucose to be converted to fat. Use this information to propose an explanation for the correlation between the skyrocketing consumption of high fructose corn syrup since 1970 and the rise in obesity during the same period.