1. Benefits
Some of the benefits that coffee has been associated with include lowering the risk of
Parkinson's disease and some types of cancer. According to the December 2009
Wall Street Journal article, coffee helps prevent type 2 diabetes, heart disease and
Alzheimer's disease. Six cups a day seems to cut prostate cancer risk, while three
daily cups reduces the incidence of gallstones. Two cups of daily coffee may even
keep people from committing suicide, lowering the risk by 60 percent.
Risks
Some of the health risks that have been enumerated regarding coffee may be related
to the way that the body metabolizes the drink. People with a specific set of genes, for
example, may be more likely to have heart disease if they frequently drink coffee,
while those without that gene set see no increased risk, according to Dr. Hensrud.
Frequent consumption of high levels of caffeine has also been linked to irritability,
headaches and anxiety. The caffeine found in coffee also has been shown to raise
blood pressure, increase the risk of miscarriage in pregnant women and raise blood
sugar levels in people who are already diabetic.
Ingredients

2. Caffeine is the main ingredient that has been studied regarding the health effects of
coffee, since it is a primary component of the drink. Some other components
suggested as things that might confer protective effects include potassium,
chlorogenic acid, vitamin E and magnesium.
Read more: http://www.livestrong.com/article/93786-coffee-health/#ixzz28vLSKBAb