Linked from
The 32 pages that link to Lactose, each with the reason it gives.
CaseinCompared with: It is milk’s carbohydrate, distinct from casein’s role as a structural protein.
Reducing sugarCompared with: Its glucose unit retains a free anomeric carbon, unlike sucrose.
LactuloseCompared with: Lactulose is structurally related but contains fructose instead of glucose.
RaffinoseCompared with: Unlike raffinose, lactose can be digested by humans who produce lactase.