It is not necessarily good for women to take multivitamins for a long time. The premise of multivitamin supplementation is to confirm vitamin deficiency or lack of, if not vitamin deficient people, long-term eating is not beneficial, but may have harmful. The multivitamin contains a variety of vitamins and trace elements, such as vitamin A, vitamin B and vitamin C. It is suitable for people with vitamin deficiency to prevent or reduce the symptoms caused by vitamin deficiency. Women can take multivitamins to regulate endocrine secretion to a certain extent, regulate the menstrual cycle, promote ovarian function, suitable for vitamin deficient maternity, for older women can also help prevent osteoporosis. However, if a person is not vitamin deficient but takes multivitamins for a long time, there may be excessive intake of vitamins, leading to toxic symptoms. In particular, excessive intake of fat-soluble vitamins accumulates in the body and can easily lead to toxicity, such as excessive intake of vitamin A, which can lead to hair loss, vomiting, diarrhea, skin flaking, blurred vision, etc.; excessive intake of vitamin E can easily trigger platelet aggregation, leading to thrombosis; excessive intake of vitamin D can lead to dry mouth, itchy skin, eye pain, etc., and can also lead to an increase in blood calcium, which can lead to hypercalcemia , inducing renal insufficiency or kidney stones. Therefore, if a woman has one or more vitamin deficiencies, should first identify the causes and types of deficiencies, under the guidance of a doctor reasonable supplement vitamins, otherwise if long-term multivitamin, but may be counterproductive.