ISSA Nutritionist Practice Exam

A client is at most risk for malabsorption of vitamin K on what type of diet?

1. High-carb diet

2. High-protein diet

3. Low-fat diet

4. High-fiber diet

The correct answer is: Low-fat diet

The correct answer highlights that a low-fat diet places a client at the highest risk for malabsorption of vitamin K. Vitamin K is a fat-soluble vitamin, which means that its absorption in the digestive system is significantly dependent on the presence of dietary fats. When a diet is low in fat, there may not be enough lipids present to facilitate the absorption of this essential vitamin, leading to potential deficiencies. In contrast, high-carb, high-protein, and high-fiber diets do not inherently affect the absorption of fat-soluble vitamins like vitamin K to the same degree. While they can impact overall nutrition and health in various ways, they do not specifically interfere with vitamin K's absorption as a low-fat diet would. Therefore, a client restricting their fat intake is at a heightened risk for malabsorption of this vitamin.