From lowered cancer risks to a sharper memory, more studies are showing that coffee is good for you – but why?

Regular coffee drinkers have a 39 percent decreased risk of head and neck cancer, according to a new study published in the journal Cancer Epidemiology, Biomarkers & Prevention. Those who drank an estimated four or more cups a day had significantly fewer cancers of the mouth and throat than non coffee drinkers, the study found.

Scientists are still trying to determine exactly what it is about coffee that gives it its disease-fighting properties, but recent research is getting closer to unlocking the mysterious power behind the energizing brew.