Clinical Nutritionist Practice Test 2026 - Free Practice Questions and Study Guide

Drugs can significantly influence nutrient absorption in the body, with one major effect being their ability to change stomach acidity and damage mucosal cells. Certain medications, such as proton pump inhibitors or antacids, alter the pH level in the stomach. This shift in acidity can hinder the breakdown of food and the absorption of nutrients, particularly vitamins and minerals that require an acidic environment for optimal absorption, such as vitamin B12 and calcium.

Additionally, some drugs can harm the integrity of the gastrointestinal mucosa, leading to conditions like gastritis or intestinal damage. This damage can result in malabsorption, where nutrients are not adequately absorbed through the intestinal lining—a critical function for maintaining overall health and nutrition.

The other options do not correctly represent how drugs can affect nutrient absorption. While some drugs might theoretically enhance digestive enzymes, this is not a prevalent mechanism by which drugs typically interfere with absorption. Increasing nutrient density relates more to dietary changes or supplementation rather than drug action. Lastly, drugs that promote faster intestinal motility can lead to reduced absorption time, which may negatively impact nutrient absorption but do not change the inherent ability of the gastrointestinal tract to absorb nutrients.