and found that it didn’t matter if they drank one cup or chain-drank eight - regular or decaf - or whether they were fast metabolizers of coffee or slow. Espresso has the highest concentration of many compounds because it has less water than drip coffee.Ī study in JAMA Internal Medicine examined the coffee habits of nearly 500,000 people in the U.K. Roasting, for example, reduces the amount of chlorogenic acids, but other antioxidant compounds are formed. “But it’s not clear at all how these different levels of compounds may be related to health.” “All of these different aspects affect the taste, but also affect the compounds within the coffees,” said Neal Freedman, a senior investigator with the National Cancer Institute. Do you prefer a dark or light roast? Coarse grinding or fine? Arabica or robusta? “These findings could be due to other factors or behaviors present in coffee drinkers.” “We don’t know for sure if coffee is the cause of the health benefits,” said Jonathan Fallowfield, a professor at the University of Edinburgh, and co-author of the British Medical Journal review. Giuseppe Grosso, an assistant professor in human nutrition at University of Catania in Italy and the lead author of an umbrella review in the Annual Review of Nutrition. The potential benefit from coffee might be from the polyphenols, which are plant compounds that have antioxidant properties, according to Dr. For example, having about five cups of coffee a day, instead of none, is correlated with a 30 percent decreased risk of Type 2 diabetes, according to a meta-analysis of 30 studies. In addition, experts say some of the strongest protective effects may be with Type 2 diabetes, Parkinson’s disease, and liver conditions such as cirrhosis, liver cancer and chronic liver disease. In examining more than 200 reviews of previous studies, the authors observed that moderate coffee drinkers had less cardiovascular disease, and premature death from all causes, including heart attacks and stroke, than those skipping the beverage. When researchers controlled for lifestyle factors, like how many heavy coffee drinkers also smoked, the data tipped in coffee’s favor.Ī large 2017 review on coffee consumption and human health in the British Medical Journal also found that most of the time, coffee was associated with a benefit, rather than a harm. For the first time, moderate coffee drinking was included as part of a healthy diet. For years, coffee was believed to be a possible carcinogen, but the 2015 Dietary Guidelines helped to change perception.
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