Certified Medical Assistant Practice Exam 2025 - Free CMA Practice Questions and Study Guide

Vitamin D is indeed an example of a fat-soluble vitamin. Fat-soluble vitamins, which include vitamins A, D, E, and K, are stored in the body's fatty tissue and liver. They require dietary fats for optimal absorption and can be stored in the body for longer periods compared to water-soluble vitamins, which are excreted more readily through urine.

Vitamin D plays a crucial role in calcium and phosphorus metabolism, which is essential for maintaining healthy bones. It also contributes to immune system function and has various other vital biological roles.

The other vitamins mentioned—B and C—are classified as water-soluble. This means they dissolve in water and are not stored in the body; rather, they need to be consumed more regularly through diet. As a result, while vitamins B and C are essential for various body functions, they do not share the properties commonly associated with fat-soluble vitamins.