Although an extra cup of coffee may make you feel like your heart is racing, researchers have found that drinking more coffee on a daily basis reduces your chances of dangerous irregular heartbeat, according to a Kaiser Permanente study. The study included 130,054 adults who drank four or more cups of coffee per day. The results showed that compared to non-coffee drinkers, they lowered their risk of being hospitalized for irregular heartbeats by 18 percent. Researchers also concluded that even those who drank a lower amount of coffee (1-3 cups a day) were still 7 percent less likely to have irregular heartbeats.