The vitamin B2 or riboflavin is essential for the formation of red blood cells, and for the immune system. It participates in the metabolism of carbohydrates, fats, and proteins. In collaboration with vitamin A, it maintains the internal walls of the mucous membranes of the respiratory and gastrointestinal systems healthy. It is involved in iron metabolism and helps reduce the feeling of fatigue and exhaustion. It also soothes eye fatigue and is useful in cases of rosacea, carpal tunnel syndrome, and the prevention of migraines.