Vitamin B2 (riboflavin) is an indispensable water-soluble vitamin in animal feed. As a core component of the coenzymes FMN and FAD, it is extensively involved in the body's energy metabolism (particularly the oxidative breakdown of carbohydrates, fats, and proteins) as well as cellular respiration. In livestock production, vitamin B2 is critical for maintaining normal growth, skin and mucosal health, visual function, and nervous system function in animals. A deficiency leads to typical deficiency syndromes, such as "curled-toe paralysis" in poultry, growth retardation, diarrhea, and ruffled feathers; dermatitis, eye disorders, and reproductive failure in pigs; and angular stomatitis in young ruminant calves. Since animals cannot synthesize vitamin B2 on their own and ingredients such as cereals contain only limited amounts—especially under the demands of intensive farming and high production performance—supplementation in compound feed is essential to meet the nutritional requirements for rapid growth, high egg production, and high reproductive performance.