Those medical studies are usually discarding the parallel social relation of drinking tea. Tea drinkers may have different habits than the coffee drinkers. This is similar than the "the children who have grown with books at home have better education", the reason is not really the books by them-self but more just a sign of the social behaviour. Might be the case of (some) tea drinkers.
Those medical studies are usually discarding the parallel social relation of drinking tea. Tea drinkers may have different habits than the coffee drinkers. This is similar than the "the children who have grown with books at home have better education", the reason is not really the books by them-self but more just a sign of the social behaviour. Might be the case of (some) tea drinkers.