All sugars are the same, be they glucose, sucrose, dextrose, fructose, lactose, honey, or molasses. 15 empty calories per teaspoon, and each will jack up your blood sugar at the same rate. The only difference is the sugar's delivery method. If it's contained in fruits, vegetables, or whole grain baked goods, for instance, the fiber in those items will slow down the absorption of the sugar. However, if the sugar is contained in a product made with processed grains, i.e. cold breakfast cereals, Rice Krispie treats, doughnuts, pastries made with some type of refined flour, etc., or in a beverage, well, not only are you getting your blood sugar level jacked up by the sugar, but your body is converting the simple carbohydrates from the refined grain into sugar, too, for a double whammy!
What's even worse is high fructose corn syrup (hfcs). Food manufacturers have been using it, exclusively in some instances, for years because it is 10 times sweeter than sugar, and the cost is 10 times less, pound for pound. Unfortunately, when you ingest hfcs, your body doesn't recognize it as a sugar, so it doesn't signal your pancreas to release insulin to process the hfcs for delivery to your cells. It simply gets slapped onto your body as excess fat, usually in the most embarrassing location it can find. Look behind you, quick! WHOMP! THERE IT IS!