Benefits of Coffee

A study of 90,000 Japanese by the National Cancer Center in Tokyo found that people who drank one to four cups of coffee daily had half the liver cancer risk of those who never drank coffee. Researchers aren’t sure why, but they speculate that antioxidants may play a role.
A study by researchers at the Harvard School of Public Health that followed more than 125,000 men and women for more than a decade found that regular coffee drinkers had a significantly lower risk of developing type 2 (or late-onset) diabetes. Studies in Sweden and Finland also concluded that coffee consumption offers protection from type 2 diabetes. Again, researchers aren’t sure why.
A half-dozen recent international studies showed a positive relationship between drinking caffeinated beverages — including coffee — and lower rates of Parkinson’s disease and Alzheimer’s disease.
Other research links coffee consumption with reduced risk of cirrhosis of the liver, colon cancer and asthma.
A cup or two of coffee can improve endurance in activities such as running, cycling and swimming, according to other research. Coffee has a strong ergogenic effect, meaning it helps people work harder and longer, explains Lawrence Spriet, an exercise physiologist at the University of Guelph who has researched the effects of caffeine on athletic performance for more than a decade. “Even small amounts of caffeine can be quite powerful,” he says.
Source : http://www.canadianliving.com/health/nutrition/a_cup_of_coffee_a_day_keeps_the_doctor_away.php