2. Although the nutritional content of black rice is high, eating black rice alone will inevitably lead to the shortage of fruits and vegetables, dairy products and meat. Moreover, black rice does not contain vitamin A, vitamin B 12, vitamin C and vitamin D, and the contents of protein and calcium are also insufficient. Eating only black rice lacks other food types, and the nutrients needed by the body cannot be met. Long-term use, the body's resistance is bound to decline, and long-term intake of protein and others is insufficient, which will also have a great negative impact on women's physiology. More importantly, without protein and other necessary nutrients, our great cause of losing weight will be hindered.