Suffering from hypertension? Fret not, just gorge on a chunk of chocolate daily. A new study says that a chocolate a day can have the same positive effect on high blood pressure as half an hour of exercise.<br/> Researchers have carried out the study and found that people with high blood pressure can reduce the chance of having a heart attack or a stroke by 20 per cent if they eat chocolate everyday.<br/>A reaserch by an Adelaide University team lead by Dr Karin Ried reveals that chocolate, particularly the dark variety, contains chemicals known as flavanols which naturally open-up blood vessels in the body, which means blood can flow more easily and the pressure drops.<br/>