The New York Daily News explained some of the reservations arising from the study: For example, the quality and consistency of records kept among the 50 countries analyzed may vary, and the results at the population level may not necessarily be consistent with the results at the individual level. The study included data on consumption of black tea and the rate of diabetes from 50 countries covered World Health Survey in 2009. Scientists looked at diseases such as diabetes, heart disease, cancer, respiratory disease and infectious diseases. The researchers found that in countries with the highest black tea consumption rates – like Ireland, where each person consumes around 2 kilograms a yearas well as Great Britain and Turkey – had the lowest levels of diabetes. Countries with the lowest levels of consumption of this tea are: Mexico, Morocco, Brazil, China and South Korea.
source: ScienceNews.pl