Clinical Nutritionist Practice Test 2025 - Free Practice Questions and Study Guide

The primary function of prebiotics in nutrition is to support the growth of beneficial gut bacteria. Prebiotics are types of non-digestible fiber compounds that serve as food for these beneficial microorganisms residing in the gut. By fermenting these prebiotics, the good bacteria can thrive and multiply, which in turn helps to maintain a balanced gut microbiota. This balance is crucial for overall digestive health and can enhance various bodily functions, including immune response and nutrient absorption.

In contrast, the other options relate to functions that are not aligned with the established role of prebiotics. The formation of fat cells and enhancing weight gain typically relate more to caloric intake and specific macronutrient compositions rather than the function of prebiotics. Additionally, prebiotics do not directly increase sugar levels; rather, they can influence metabolic health and might help in regulating blood sugar through improved gut health and insulin sensitivity.