Riboflavin-5'-phosphate sodium is a form of vitamin B2, also known as riboflavin, that plays a crucial role in energy production and cellular function. It is a water-soluble vitamin that helps convert carbohydrates, fats, and proteins into energy, supporting overall metabolism. This compound is often used as a dietary supplement to prevent or treat riboflavin deficiency, which can lead to symptoms like sore throat, redness, and swelling of the lining of the throat, cracks on the outsides of the lips, and inflammation of the tongue. It is also important for maintaining healthy skin, eyes, and nerve functions.