sugar alcohols are derivatives of sugar. You need to pick up a book on sugar chemistry if you really want detailed info that will bore you to tears. However, I happen to know because I've done the research, if you see Xylitol and Sorbitol on your list of ingredients, then those are sugar alcohols. I dont eat clif bars because they are not keto friendly, but I am most certain that you are capable of reading the back of the pacage, or....even bigger idea, use the net to look up what sugar alcohols actually are. from an actual food science source.