To be nitpicky, startch is a polysaccharide, i.e. a long chain of sugars. Although it's ultimately made of glucouse, polysaccharides are normally not considered

To be nitpicky, startch is a polysaccharide, i.e. a long chain of sugars. Although it's ultimately made of glucouse, polysaccharides are normally not considered sugars, perhaps partly because they're usually not sweet, but also because of their complexity that sets them apart from their constituent sugars. So a bit like we don't call a house "brick".