Why do you need a certain amount of thiamine and riboflavin in your diet every day?

Thiamine Riboflavin. I commend you for your desire for Good Health! Thiamin acts as a cofactor for the metabolism of carbohydrates, helping turn starch and sugar into the energy our bodies need, and plays an important role in nerve transmission. Riboflavin coenzymes play major role in energy production, cellular function, growth and metabolism of fats, drugs, and steroid.