Professional and Linguistic Assessments Board (PLAB) Practice Exam

What dietary recommendation can help alleviate constipation?

1. High protein diet

2. Low-carb diet

3. High-fiber diet

4. Low-fat diet

The correct answer is: High-fiber diet

A high-fiber diet is widely recognized as one of the most effective dietary recommendations for alleviating constipation. Fiber plays a crucial role in digestive health by adding bulk to the stool and promoting regular bowel movements. This increased bulk stimulates the intestines, helping to propel waste through the digestive tract more effectively. Soluble fiber, found in foods like oats, fruits, and beans, can help to soften the stool, while insoluble fiber, found in whole grains, nuts, and vegetables, adds bulk. Consuming a variety of high-fiber foods encourages a healthy digestive system and can lead to improvements in constipation symptoms. In contrast, a high protein diet may not offer the necessary fiber content needed to support healthy bowel function. Low-carb diets often limit fiber-rich foods such as fruits and whole grains, which are vital for preventing constipation. Similarly, a low-fat diet, while potentially beneficial for other health reasons, does not inherently increase fiber intake, which is key for addressing constipation. Therefore, a high-fiber diet is the most appropriate recommendation for relieving this condition.