Nicotinic acid is widely used in the food and pharmaceutical industries. In the food sector, it serves as a nutrient additive to fortify products, ensuring adequate intake of essential vitamins. In pharmaceuticals, it is a key component in the formulation of dietary supplements and medications aimed at treating pellagra, a condition caused by vitamin B3 deficiency. Additionally, nicotinic acid is employed in the production of cosmetics, where it acts as an active ingredient to improve skin health and appearance. Its role in biochemical research is also significant, as it is used in studies related to metabolic processes and enzyme functions.