Niacin (nicotinic acid) and niacinamide (nicotinamide) are essential forms of vitamin B3 widely used in the prevention and treatment of nutritional deficiencies, food fortification programs, cardiovascular therapies, and premium skincare formulations. Growing consumer awareness of preventive healthcare, increasing adoption of nutritional supplements, and rising government initiatives promoting food fortification are supporting market expansion worldwide. In addition, the rapid growth of the cosmetics industry and the widespread incorporation of niacinamide into serums, moisturizers, anti-aging creams, and acne treatment products have significantly accelerated global demand.