Which vitamin is also referred to as niacin and aids in energy metabolism involving carbohydrates, fats, proteins, and alcohols?

Niacin is indeed known as vitamin B3, which plays a crucial role in energy metabolism. This vitamin is involved in converting macronutrients—carbohydrates, fats, and proteins—into forms of energy that the body can use. Specifically, niacin is a part of coenzymes such as NAD (nicotinamide adenine dinucleotide) and NADP (nicotinamide adenine dinucleotide phosphate), which are essential for various metabolic processes, including the catabolism of carbohydrates and fats, as well as the synthesis of fatty acids and cholesterol.

Moreover, niacin also contributes to the metabolism of alcohols, making it a significant player in overall metabolic health. Because of these diverse roles, sufficient intake of vitamin B3 is vital for maintaining energy levels and supporting bodily functions related to energy production. This connection emphasizes its importance in nutrition and highlights why it is recognized specifically as vitamin B3.