NETA Personal Trainer Practice Exam

Which of the following is an example of a fat-soluble vitamin?

1. Vitamin C

2. Vitamin B

3. Vitamin D

4. Vitamin H

The correct answer is: Vitamin D

Vitamin D is classified as a fat-soluble vitamin, which means it is stored in the body's fatty tissue and liver. Fat-soluble vitamins are absorbed along with dietary fats and require the presence of fat in the diet for proper absorption. Once consumed, Vitamin D can be stored in the body for an extended period, which is beneficial for maintaining adequate levels, especially during periods of low sun exposure, as it is also synthesized in the skin with sunlight. In contrast, Vitamin C is a water-soluble vitamin, which means it dissolves in water and is not stored in the body, requiring regular intake through diet. Vitamins in the B complex category are also water-soluble vitamins involved in energy production and other vital functions. Vitamin H, more commonly known as Biotin, falls under the B vitamin category and is again water-soluble. Understanding the classifications of vitamins is essential for recognizing their roles in nutrition and how they should be included in dietary intake.