In recent decades, more than 19,000 studies have been done examining the impact of coffee. Overall, research has shown that coffee is more helpful than harmful. Some of these studies include the Annals of Internal Medicine research on diabetes and the University of Bristol’s study on cognitive mood.

An NBC report said that some studies show drinking less than 24oz of coffee per day decreases bladder and colon cancer because of its ability to keep the body regular.

Health reports in The Daily Check Up found that coffee does not cause heart disease.

The Harvard School of Public Health and the Annals of Internal Medicine found that coffee reduces the risk of diabetes by 30 percent in women and by 50 percent for men.

The Coffee Science Information Center found that the caffeine in coffee stimulates and improves alertness in the brain by providing a mild stimulant to the central nervous system.

In the past 30 years, nine studies have shown that regular coffee consumption over time may reduce the risk of Parkinson’s Disease. (The Coffee Science Information Center)

Recently published research in the American Journal of Epidemiology found "neither caffeinated nor decaffeinated coffee was associated with the risk of myocardial infarction"— even for those drinking more than four cups of coffee a day. (The Coffee Science Information Center)

WebMD Health stated that two cups of coffee a day reduces the risk of cirrhosis by 80 percent. Cirrhosis is irreversible scarring an degeneration of liver tissue that interferes with blood flow.

Recently published research in the Journal of the American Medical Association found that drinking two to three cups of caffeinated coffee a day reduced the risk of developing gallstones among men by 40 percent. For those who drink four or more cups of caffeinated coffee a day, the risk of developing gallstones was reduced by 45 percent. (The Coffee Science Information Center)

Two studies conducted in the United States and Italy found that the caffeine in coffee helps to treat asthma and headaches. (Many modern headache medicines contain the same amount of caffeine as a cup of coffee.)

Some studies have shown that coffee contains four times as many cancer fighting anti-oxidants than green tea. These anti-oxidants increase sensitivity to insulin, which will improve the body’s response to it. (The Coffee Review.)