Last week, two patients asked Dr. Stanley L. Hazen, a cardiologist at the Cleveland Clinic, how much daily alcohol consumption would be good for their cardiac health. He gave them both well-accepted medical advice: An average of about one drink a day helps the heart…Then he saw a paper published in JAMA Network Open whose findings upended his thinking about what to tell patients…Its conclusion: There is no level of drinking that does not confer heart disease risk. The risk is small if people have an average of seven drinks a week when compared with none. But it increases quickly as the level of alcohol consumption rises.