Americano usually refers to American-style coffee, which is a kind of black coffee, black coffee can assist in weight loss. However, because weight loss requires meeting the total calorie intake from food less than the total calorie consumption, so simply drinking coffee can not achieve real weight loss, in addition to long-term weight loss by drinking black coffee can also lead to many adverse consequences. Caffeine can excite the nerve center, increase the metabolic rate, accelerate fat metabolism, drinking black coffee can relieve fatigue, usually with pure milk to reduce the bitter taste. However, some people drink too much black coffee in pursuit of weight loss and to speed up the metabolic rate, which can lead to excessive caffeine intake, affecting the function of the heart, brain, kidneys and stomach and other organs, and disrupting the body’s natural rhythm, so the frequency and intake of coffee should be controlled. Some people drink coffee for the pursuit of taste and add too much sugar, instant black coffee sold on the market contains phyllo, sugar and other ingredients, not only can not assist weight loss, but also increase the risk of obesity. The combination of diet control and exercise is a more effective way to lose weight, so it is recommended that people who lose weight usually consume more vegetables, fruits and other foods, and reduce the intake of fatty meat and fried foods. At the same time can be appropriate to drink coffee to assist weight loss, daily regular aerobic exercise, such as cycling, rope skipping, jogging, walking, etc., long-term adherence can improve the body shape, to achieve weight loss purposes.