Riboflavin 5-phosphate, also known as riboflavin-5′-phosphate or flavin mononucleotide (FMN), is the phosphorylated form of vitamin B2 (riboflavin). It plays a crucial role in various biochemical processes in the human body, including energy metabolism, antioxidant defense, and enzyme activation. In the food and beverage industry, riboflavin 5-phosphate is primarily used as an additive for its nutritional and functional properties.