Vitamin B2 (riboflavin) is an indispensable water-soluble vitamin in animal feed. As a core component of the coenzymes FMN and FAD, it is widely involved in the body's energy metabolism (particularly the oxidative breakdown of carbohydrates, fats, and proteins) and cellular respiration. In livestock production, vitamin B2 is essential for maintaining normal growth, skin and mucosal health, visual function, and nervous system function. Deficiency leads to typical deficiency symptoms, such as "curled-toe paralysis," growth retardation, diarrhea, and ruffled feathers in poultry; dermatitis, eye disorders, and reproductive disorders in pigs; and angular stomatitis in young ruminant calves, among others. Since animals cannot synthesize it on their own and its content in ingredients such as grains is limited, especially under the demands of intensive farming and high production performance, it must be supplemented in complete feed to meet the nutritional needs for rapid growth, high egg production, and high reproductive performance.