What is one essential function of Vitamin B3 in the body?

Vitamin B3, also known as niacin, plays a vital role in the conversion of carbohydrates into energy. This process is crucial as it helps the body efficiently utilize the food we consume. Vitamin B3 is involved in the metabolism of carbohydrates, fats, and proteins, serving as a precursor to coenzymes such as NAD and NADP. These coenzymes are essential for various biochemical reactions, including those that release energy from food.

While the other options may relate to functions of other vitamins or nutrients, they do not specifically pertain to the primary role of Vitamin B3. For example, protein synthesis is primarily associated with vitamins like B6 and B12, while skin health may involve other vitamins such as A and E. Vision support typically relates to Vitamin A. Therefore, B3's primary function in energy metabolism distinctly highlights its essential role in supporting the body's energy needs.