Black coffee with cinnamon is a common class of drinks, does not have the efficacy of drugs, but can be supplemented for the human body, such as water, and there is a certain refreshing effect. Black coffee calories are very little, a brand of black coffee, for example, 100 milliliters of American black coffee contains 3 calories, of which 0.66 grams of carbohydrates, 0.22 grams of protein, while containing more caffeine and other nutrients, moderate consumption can be refreshing. However, for some people with cardiac arrhythmia, gastroesophageal reflux patients, and insomnia, drinking coffee is likely to aggravate the symptoms, thus triggering discomfort. Everyone needs to drink black coffee in moderation according to their own situation. Cinnamon powder is a common flavoring agent that can be added to coffee to add layers of flavor. Each 100 grams of cinnamon powder contains 253 calories. It contains 19.6 grams of protein, 55.8 grams of carbohydrates, 4.36 grams of fat, 50 milligrams of vitamin C, 1,784 milligrams of calcium, and 48.78 milligrams of iron. Black coffee with cinnamon powder combines the advantages of the two ingredients to provide the body with a diverse range of nutrients, but it does not have the efficacy of medicine and cannot cure diseases. If you are sick, you still need to seek medical attention as soon as possible to find out the cause and use medication scientifically under the guidance of a doctor.