* Diabetes. Twenty studies conducted worldwide show that coffee reduces the risk of type 2 diabetes by 50%. The researchers suspect the cause is chlorogenic acid in coffee act to slow the absorption of sugar in the digestive tract. Chlorogenic acid also stimulates the formation of GLP-1, a chemical that increases insulin (a hormone that regulates glucose uptake into cells). Other substances in coffee that is trigonelin (pro vitamin B3) is also thought to help slow the absorption of glucose.
* Cancer. Research has consistently shown that coffee reduces the risk of liver cancer, breast cancer and colon cancer.
* Cirrhosis. Coffee protects the liver from cirrhosis, especially cirrhosis due to alcoholism.
* Parkinson's Disease. Coffee drinkers have half the risk of Parkinson's lower than those who drank no coffee.
* Heart disease and stroke. Coffee consumption does not increase the risk of heart disease and stroke. In contrast, coffee actually slightly reduce the risk of stroke. A study of more than 83,000 women over the age of 24 years showed those who drank two to three cups of coffee a day had a stroke risk 19% lower than those who drank no coffee. Studies of a number of men in Finland showed similar results.
* Cognitive function. Study of 4197 women and 2820 men in France showed that drinking at least three cups of coffee a day can prevent decline in cognitive function due to aging of the brain up to 33 percent in women. However, similar benefits are not found in men. This may be because women are more sensitive to caffeine.
Negative effects of coffee
However, coffee also has a negative effect. The main content of caffeine as coffee is an addictive stimulant. Caffeine affects the cardiovascular system such as increased heart rate and blood pressure. The negative impact that appears when you consume to excess.
For most people, drinking two to three cups of coffee does not have a negative effect. Drinking coffee with more frequency than that can cause heart palpitations, insomnia, headaches and other disorders. Therefore, for those who consumed coffee that was not sleepy, for example due to lack of sleep is suggested that consumption spread throughout the day.
Research on the relationship of coffee consumption and miscarriage does not provide uniform conclusions. But, for the safety of pregnant women are advised not to drink more than one cup of coffee a day.
