The benefits and harms of coffee

Lately more and more on the real health benefits of consuming coffee, but they must be weighed against the possible negative effects, especially at higher doses. The ideal "fix" is always difficult to determine because people's perceptions of "a cup of coffee" vary widely, as the size of coffee cups. But the good news is that many of the benefits associated with 2 to 4 cups a day "and that's what most Americans drink anyway," said Joe Vinson, Ph.D.. Here are some interesting findings: 

 Coffee is good for the brain
Between 1 and 5 cups of coffee a day can reduce the risk of dementia and Alzheimer's disease and Parkinson's disease. How? Antioxidants in coffee can prevent some damage to brain cells and stimulate neurotransmitters involved in cognitive function. Preliminary studies have indicated that increasing the intake of coffee (or tea), the incidence of glioma, a type of brain cancer, tend to decrease. Some researchers speculate that these compounds in activated DNA repairing protein in cells, possibly preventing DNA damage that can lead to the formation of cancerous cells.

 Coffee beat diabetes
Studies link frequent coffee consumption (four or more cups per day), with a lower risk of developing type 2 diabetes. Scientists suspect that antioxidant compounds in hlorogenichnata acid may increase the sensitivity of cells to insulin, which helps regulate blood sugar. While most of the studies did not report whether the coffee is made ​​with caffeine, decaffeinated coffee could be even better, since other studies have found that caffeine leads to a blunting of insulin sensitivity.

 Coffee has heart benefits
Some studies have shown that consuming one to three cups of coffee per day less a stroke than non coffee drinkers. Antioxidants in coffee extinguish harmful inflammatory effects on arteries. Researchers speculate that the compounds could increase the activation of nitric oxide, a substance that dilates blood vessels and lowers blood pressure.

 Coffee care for liver
Research in the field is limited, but it appears that the more coffee people drink, the lower is the incidence of cirrhosis and other liver diseases. In an analysis of nine studies found that an increase of 2 cups of coffee daily intake is associated with a 43 percent lower risk of liver cancer. Possible explanation: antioxidants and caffeine and caffeic acid can prevent liver inflammation and inhibit cancer cells.

 Coffee causes irritations
Sensitive to caffeine may experience irritability and anxiety at high doses. The chemical composition of caffeine resembles adenosine - a chemical associated with sleep and dispensing vessels. Caffeine binds to adenosine receptors and prevents its absorption, for which the activity of nerve cells increases, blood vessels constrict and get a refreshing or welcome side effect.

 Coffee may contain cholesterol
Unfiltered coffee contains a compound that can increase levels of LDL (bad) cholesterol. Drink filtered coffee.