The coffee came out from the black list of food: more and more studies certify its quality and therapeutic properties especially at the level of metabolic and neurological disease.
Tea and coffee, after water, are the most commonly consumed beverages in the world and are the top sources of caffeine and antioxidant polyphenols. Many studies to assess the health effects of chronic tea and/or coffee consumption.
Tea consumption, especially green tea, is associated with significantly reduced risks for stroke, diabetes and depression, and improved levels of glucose, cholesterol, abdominal obesity and blood pressure. Habitual coffee consumption in large epidemiological studies is associated with reduced mortality, both for all-cause and cardiovascular deaths. In addition, coffee intake is associated with risks of heart failure, stroke, diabetes mellitus and some cancers in an inverse dose-dependent fashion. Surprisingly, coffee is associated with neutral to reduced risks for both atrial and ventricular arrhythmias. However, caffeine at high doses can increase anxiety, insomnia, calcium loss and possibly the risk of fractures. In effect a moderate daily intake of 3-4 cups of coffee has convincing protective effects against development of type 2 diabetes and Parkinson’s disease. The literature also indicates that moderate coffee intake reduces the risk of stroke, the overall risk of cancer, Alzheimer’s disease, suicide and depression. However, pregnant women, people suffering from anxiety disorder and persons with a low calcium intake should restrain from moderate or high intake of coffee due to uncertainty regarding potential negative effects on pregnancy, anxiety and risk of osteoporosis, respectively.
Coffee and tea can generally be recommended as health-promoting additions to an adult diet. Adequate dietary calcium intake may be particularly important for tea and coffee drinkers.
Drinking coffee reduces the risk of suicide: says a study conducted by Harvard School of Public Health. According to the researchers at the American university , people who consume 2 to 4 cups of coffee a day have a 50 % less chance to commit suicide than others.
Caffeine, in fact, seems to have the same effects as an antidepressant.
“We were able to evaluate the association between the consumption of caffeinated beverages and non- caffeinated , confirming its protective effect” said Michel Lucas, one of the authors of the study. In the past, the substance has been considered an excellent antidote to depression : a research of 2011 , more expert at Harvard University, it was found , in fact, that women who drink coffee have a 15% less chance of getting sick.
However for observers the new results are amazing. Lucas explained that the beneficial effect is due to the impact of caffeine on the neurotransmitters that affect emotions.
The other drinks that contain this substance, such as tea, instead have a much less effect , ” in a cup of coffee there are about 140 mg of caffeine – the researcher added – while in the tea there are only 47 mg. For which to get the same benefit would be needed three cups “.
The research, published in The World Journal of Biological Psychiatry, involved around 200 thousand individuals, analyzed in a time span of 16 years.