Lactose Intolerance Explained

Lactose intolerance is a common digestive issue. It occurs when the body cannot fully digest lactose, the main sugar found in milk and dairy products.

Analyzing Options for Lactose Intolerance

Let's examine each option to understand why Option 3 is the correct definition of lactose intolerance:

• Option 1: Characterised by adverse reactions to gluten.
  This option describes gluten intolerance or celiac disease, not lactose intolerance. Lactose intolerance relates to dairy sugar, while gluten issues involve wheat proteins.
• Option 2: A condition where small intestines are unable to break down gluten.
  Similar to Option 1, this focuses on gluten, which is unrelated to lactose intolerance. The problem in lactose intolerance is with dairy sugars.
• Option 3: A condition in which the small intestines are unable to break down the sugars found in dairy products.
  This is the correct definition. Lactose intolerance specifically means the small intestine lacks sufficient lactase, the enzyme needed to break down lactose (the sugar in dairy products). Undigested lactose causes digestive discomfort.
• Option 4: A condition where fructose isn't efficiently absorbed into the blood.
  This describes fructose malabsorption, a different condition related to fruit sugar (fructose), not dairy sugar (lactose).

Conclusion

Based on the analysis, lactose intolerance is accurately defined as the inability of the small intestine to break down the sugars (lactose) found in dairy products.