The World Health Organization made it clear in 2016 that coffee does not pose a cancer risk. Coffee has been shown to reduce the risk of cancers such as liver and breast cancer.
Moderate coffee consumption did not increase the risk of cardiovascular disease. Caffeine is a natural diuretic. Coffee has a certain effect on the gastrointestinal tract, people with stomach ulcers try to drink less or not to drink; Caffeine can excitement central nervous system, the person that has sleep disorder does not drink as far as possible; Caffeine may affect the nervous system of developing children and teenagers.