If you are at risk for liver disease, drinking caffeinated coffee and soda may help protect you from getting it, a new study shows.According to research presented at the Digestive Disease Week meeting in New Orleans, a researcher from the National Institute of Diabetes and Digestive and Kidney Diseases found people at high risk for liver problems can reduce their risk by drinking coffee and other caffeinated beverages.There have been other studies that have shown this effect from caffeine, said lead researcher Dr. James E. Everhart. However, why caffeine protects against liver disease is not known.