Sugar in Milk Products Many People Can't Tolerate

This page is the CodyCross answer for the clue below from La Bella Roma, Group 408, Puzzle 2 (Contarelli Chapel).

Question is: Sugar in Milk Products Many People Can't Tolerate

and the answer is: LACTOSE

Word Meaning:

LACTOSE — (biochemistry) The disaccharide sugar of milk and dairy products, C₁₂H₂₂O₁₁, a product of glucose and galactose used as a food and in medicinal compounds.

Definitions from Wiktionary.