Riboflavin is yellow or orange-yellow, so it can be useful as a food coloring. People get some very bad kinds of sickness (deficiency diseases) when their food has too little riboflavin. Adding extra riboflavin can stop people from getting such sicknesses. To prevent riboflavin deficiency, people may add riboflavin to baby foods, breakfast cereals, pasta, sauces, fruit drinks, and foods such as cheese that are made from milk (dairy products). People call it fortification with riboflavin when they add riboflavin to food. A lot of the riboflavin that people make, they use in vitamin pills.