People who drink up to half a bottle of wine a day are healthier than teetotallers, according to a surprising new study.This is because those who enjoyed three glasses of wine a day tended to take more exercise, have a higher social status and suffer from less stress, according to researchers.A Team from the Public Assistance Hospitals of Paris studied almost 150,000 people and found those who enjoyed low or moderate intake of alcohol were fitter than those who never touched a drop or drank to excess.