Coffee and tea may reduce the risk of serious liver damage in people who drink too much alcohol, are overweight or have too much iron in the blood.
The study of nearly 10,000 people showed that those who drank more than two cups of coffee or tea per day developed chronic liver disease at half the rate of those who drank less than one cup each day.
A daily dose of coffee, decaf or tea can reduce the risk of getting Type 2 diabetes by 25 to 35 percent, according to a new study published in the Archives of Internal Medicine.
Specifically, four cups of coffee or tea a day can lead to the 25 to 35 percent decrease in chances of getting diabetes -- or a 7 percent lowering of risk for every cup.
The study reviewed past research between 1966 and 2009, encompassing more than 450,000 patients, and also involved original research. It found that coffee and tea protect against metabolic syndrome.
But.... Caffeine stimulates you nervous system, increases heart rate and transiently increases BP. The Framingham study failed to show caffeine to be a risk factor for cardiac disease. Still its hard to imagine a high stress state caused by excess caffeine can be beneficial. My best advice would be moderation.