Mouth ulcers can be properly supplemented with vitamin B2. vitamin B2, also known as riboflavin, is a water-soluble B vitamin, involved in cell growth and metabolism of a variety of physiological processes, as a coenzyme plays an important physiological role for the mucous membranes, the skin has an important restorative function, can be supplemented through food, including animal offal, poultry, eggs, beans and other foods, but also can be taken orally as a vitamin B2 tablets to supplement. Mouth ulcers occur for many reasons, as follows: 1, mental stress, fatigue caused by the body’s immune function can cause mouth ulcers; 2, viral infections or local mechanical, physical trauma, can also cause mouth ulcers; 3, vitamin deficiencies, such as vitamin B2 deficiencies, or trace element deficiencies, such as zinc deficiencies are also prone to cause mouth ulcers. So in terms of nutritional supplementation, you can do vitamin and trace element level measurement, targeted supplementation, may be more effective. So supplemental vitamin B2 for mouth ulcer prevention, repair have a certain role.