There's good news for the 108 million Americans who wake up and smell the coffee each day. The latest research findings suggest your morning java may be better for you than you think. Coffee is a rich source of disease-fighting antioxidants, and studies have shown that it may reduce cavities, boost athletic performance, improve moods, and stop headaches. It may also reduce the risk of type 2 diabetes, colon cancer, liver cancer, gallstones, cirrhosis of the liver, and Parkinson's disease. However, there are some points to consider. Long-term studies have shown that for most people, coffee is far more healthful than harmful. Regular coffee drinkers can reduce their risk of Parkinson's disease by 80%, the risk of colon cancer by 25%, the risk of cirrhosis by 80%, and cut the risk of gallstones in half. The antioxidants and natural magnesium in coffee affect blood sugar levels and may be responsible for the lower risk of type 2 diabetes. Coffee also contains trigonelline, an antibacterial compound that may help prevent cavities. Caffeine in coffee offers health benefits like easing headaches and boosting athletic performance. However, caffeine is a drug and can cause health problems like osteoporosis or high blood pressure if consumed excessively. For most people, two cups of coffee a day are fine, but more than that can cause nervousness, rapid heartbeat, sleeplessness, and irritability. If you experience these symptoms, consult your doctor. Pregnant or nursing women, and those with high blood pressure, heart disease, or osteoporosis should also monitor their intake.