Here's what I've gathered from reading online articles and forums:
Muscles need glucose. Other sugars can be converted into glucose, but it takes enzymes time. Monosaccharides are absorbed quickly, polysaccharides need to be broken down.
glucose > fructose > galactose
monosaccharide > disaccharide > polysaccharide
sucrose = glucose + fructose disaccharide
lactose = glucose + galactose disaccharide
dextrose = glucose monosaccharide
maltodextrin = glucose...