Lactose is milk sugar, and humans produce substantial lactase enzyme to digest it when we are infants. However, we soon lose some or even all of our lactase after childhood. In such cases, undigested lactose passes to the lower intestine where bacteria break it down into lactic acid and CO₂, causing painful gas and bloating. This problem could be avoided by

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Quizplus · Accepted Answer

Avoiding dairy products containing lactose and taking lactase enzyme tablets when consuming lactose products are both effective ways to avoid the discomfort caused by lactose intolerance. Avoiding lactose-containing dairy products prevents undigested lactose from reaching the lower intestine, while taking lactase enzyme tablets helps in digesting lactose, thus preventing the symptoms associated with lactose intolerance.

Lactose Is Milk Sugar, and Humans Produce Substantial Lactase Enzyme