Which of the following can be safely consumed by individuals with lactose intolerance?

Appeared in: JIPMER Nursing Officer-2024

Explanation

Yogurt is suitable for many individuals with lactose intolerance because it undergoes fermentation.
The live bacterial cultures (probiotics) in yogurt produce their own lactase enzyme, which pre-digests a significant portion of the lactose into lactic acid.
This process reduces the amount of lactose that needs to be digested by the individual's body, making it more tolerable than other milk products.

Option A: Removing fat to make skimmed milk does not reduce its lactose content; it remains high and can trigger symptoms.
Option C: Ice cream is made from milk and cream, making it very high in lactose. The high fat and sugar content can also worsen gastrointestinal symptoms.
Option D: Toned milk is a mixture of whole milk and skimmed milk powder, resulting in a significant lactose content that is unsuitable for intolerant individuals.

Visual 1: Infographic: A chart comparing the lactose content in grams for a standard serving of milk, yogurt, ice cream, and hard cheese.
Visual 2: Diagram: A simple flowchart showing the fermentation process where bacteria convert lactose into lactic acid in yogurt.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Dietary management for lactose intolerance as background academic context rather than a clinical decision trigger.
Nurses must educate patients with lactose intolerance on reading food labels to identify hidden sources of lactose in processed foods and medications.
Advise patients to introduce potentially tolerable foods like yogurt in small amounts to assess individual tolerance levels, as it can vary significantly.
What if the patient is a child? For children with lactose intolerance, it's crucial to ensure they receive adequate calcium and Vitamin D from alternative sources like fortified plant-based milks (soy, almond), leafy greens, and fish to support bone growth.

How to Approach the Question

First, identify the core of the question: It asks for a food that is safe for someone with lactose intolerance.
Recall the pathophysiology of lactose intolerance: a deficiency in the lactase enzyme needed to break down lactose, the sugar in milk.
Analyze the options based on how they are processed. Think about which process might reduce lactose content.
Milk (skimmed, toned) is the primary source of lactose. Ice cream is made from milk. This makes them unlikely candidates.
Yogurt is made by fermentation. Recall that fermentation involves bacteria that consume sugars. This is the key differentiator.
Conclude that the fermentation process in yogurt reduces lactose, making it the most likely safe option.

Concept Tested & Keywords

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