Bulletproof coffee is an imitation of Tibetan ghee tea, adding cold-pressed coconut oil and natural butter to black coffee, which, if consumed in excess, may cause certain harm to women, including calcium deficiency, affecting fetal development, and raising cholesterol levels. Clinical advice for any food or drink, the importance of a balanced intake is stressed, do not greed for more, avoid long-term, large, single drink the same drink. 1, calcium deficiency: caffeine can not only inhibit the intestinal absorption of calcium, but also promote the loss of calcium in the body, as well as urinary calcium excretion, causing calcium deficiency, so women who drink bulletproof coffee for a long time should pay attention to additional calcium supplementation, such as drinking more milk; 2, affect the development of the fetus For women during pregnancy, if they drink bulletproof coffee for a long time, because the absorption rate of caffeine in the body is relatively high, it is easy to enter the fetus through the placental barrier, however, the fetal liver development has not yet been perfect, the metabolic rate of caffeine is low, so caffeine has a certain impact on the fetus, and even the possibility of teratogenic; 3, raise cholesterol levels: because of the addition of coconut oil, butter and other cholesterol-rich fats in black coffee, the human body should pay attention to additional calcium supplementation, such as drinking more milk. Cholesterol fats, after ingestion by the body, can cause the human cholesterol level to rise, and elevated total serum cholesterol is an important risk factor leading to atherosclerosis, so clinical advice is best not to drink bulletproof coffee for a long time.