Coffee is a drink consumed from ancestral times and is now one of the world's favorite beverages. Drinking coffee causes an old debate about hypertension. Several studies have shown that at some frequencies coffee drinking is clearly a protective factor of hypertension. Coffee can affect blood pressure due to the content of polyphenols, potassium and caffeine. Polyphenols and caffeine reduce blood pressure, while caffeine has the power to increase blood pressure. The smallest coffee effect in blood pressure will have an impact on public health, because coffee is consumed by the community.