Lactose is milk sugar, and as infants, humans produce substantial amounts of the lactase enzyme to digest it. however, as we age, we soon lose some or even all of our lactase, in such cases, undigested lactose passes to the lower intestine where bacteria break down into lactic acid and co2, causing painful gas and bloating. this problem could be avoided by. a) avoiding all dairy products containing lactose. b) taking lactase enzyme tablets when consuming lactose productsc)taking any enzyme tablets when consuming dairy productsd) consuming lactose in tablet forme) taking lactase enzyme tablets or avoiding all dairy products.