Is coffee healthy? A question that has had many researchers in recent years. While some warned of the dehydrating effect of the bridge and possible damage to the heart, researchers at the University of Toronto have now credited coffee with positive effects on the brain. With proper, namely dark roasting of coffee beans, diseases like Parkinson's or Alzheimer's should be prevented.
The deciding factor is a group of constituents, phenylindans, which are produced as part of the roasting process. Three coffee was tested – light-fried, dark grilled and caffeine-free dark bread. According to study writers Ross Mancini, Yanfei Wang and Donald Weaver, it has been found that dark roast (also caffeine-containing) have a particularly high proportion of phenylindans, which in turn inhibits the production of Alzheimer's and Parkinson's related proteins (beta amyloid and tau). The conclusion: The longer the roast, the more phenylindan is found in the coffee.
On the question of the amount of coffee that is healthy, the survey gives no answer. Also if coffee could be used as a therapeutic agent, it could not be determined. It is postulated that further research is needed.
Connection between coffee and life?
Already in 2017, statisticians led by Marc Gunter from Imperial College London reported that coffee consumption could affect life expectancy. For this purpose, data were compared from the long-term study EPIC (European Prospective Investigation Into Cancer and Nutrition) with more than half a million people from ten European countries. The result: those who drank more coffee had a lower risk of dying from cardiovascular disease and digestive disorders.
A result, however, would not encourage excessive consumption of the dark bridge. As the main author of the study, Marc Gunter warned, "Due to the limitations in observation research, we are not at one point to recommend more or less coffee consumption." But: It suggests that moderate coffee consumption of about three cups a day would not be harmful but may be beneficial to your health.
>> Study from the University of Toronto
>> Study on coffee / life expectancy in annals for internal medicine