Vitamin B₂ can mainly prevent and treat vitamin B₂ deficiency and supplement the body with vitamin B₂, there is no special efficacy and effect for women. Vitamin B₂ for the body of yellow enzyme cofactor components (yellow enzyme in biological redox play the role of hydrogen transfer), when the lack of, it affects the body’s biological oxidation, so that the metabolism is impaired. Its lesions are mostly manifested as inflammation of the mouth, eyes and external genital areas, such as stomatitis, labial inflammation, lingual inflammation, ocular conjunctivitis and scrotal inflammation, etc. Therefore, this product can be used for the prevention and treatment of the above diseases. Water-soluble vitamin B2 hardly produces toxicity under normal renal function condition. Urine is yellow in color when large amounts are taken. When taking vitamin B₂ on an empty stomach, the absorption is not as good as when taking it with food, so it is better to take it during or immediately after eating. It should not be combined with metoclopramide. Urine is yellowish-green in color after taking it. It is recommended to go to the regular hospital in time for medical consultation, and follow the doctor’s instructions for symptomatic treatment.