Something that has been popularized in certain countries is the notion that there is a huge difference between different kinds of sugars, and that especially fructose is harmful to people. I wonder if there is any truth to that.
There are other sugars that either differ only slightly from glucose or are dimer, etc. AKA lactose is a disaccharide sugar composed of galactose and glucose. Compare with sucrose which is disaccharide composed of glucose and fructose.