Multivitamin Element 21 is a complex ingredient rich in a total of 21 kinds of multivitamins and trace elements. Multivitamin Element 21 can prevent and treat various diseases caused by vitamin and mineral trace element deficiencies and can be applied to children, as well as adults and the elderly. In particular, Multivitamin 21 can be used for the prevention and treatment of oral mucosal ulcers, non-healing skin mucosa or blood system diseases, immune deficiency, gastrointestinal disorders, cardiovascular diseases, hypertension, peripheral neuritis in combination with diabetes, chronic renal insufficiency and liver cell damage caused by vitamin B deficiency.