This document summarizes several studies on the relationship between coffee/tea consumption and health risks. It finds that coffee/tea intake can have contradictory effects depending on the type of cancer. A study in Spain found increased risk of bladder cancer only in those drinking 4 or more cups of coffee per day. A study in Iran associated intervals of drinking tea of 2-3 minutes or less than two minutes with higher risk of esophageal cancer. Another study found a lower risk of brain tumors among those drinking 5 or more cups of coffee per day. In conclusion, the effects of coffee/tea on cancer risk depend on the specific cancer and more research is needed to understand the active ingredients involved.