Vitamin B3 (nicotinamide)

Vitamin B3 is a water-soluble B-group vitamin found naturally in many foods of animal and plant origin, including meat, fish, legumes and whole grains. It exists in several forms, including niacin and nicotinamide; the latter is the amide form widely used in supplementation due to its good digestive tolerability. At a metabolic level, vitamin B3 plays a central role in cellular energy production: it contributes to the normal metabolism of macronutrients (carbohydrates, fats, proteins) and supports normal functioning of the nervous system. It also contributes to normal psychological function, helps reduce fatigue, and is involved in normal sulfur metabolism. Insufficient vitamin B3 intake can occur with unbalanced diets or increased physiological needs. Nicotinamide supplementation offers a convenient and well-tolerated way to meet recommended daily intakes, thereby supporting overall nutritional balance.