Key points from article :
The research in European Heart Journal claims that people who are overweight are at increased risk of heart disease even if they appear medically healthy.
Health data on more than half a million people in 10 European countries, including the UK have been studied.
After a follow-up period of more than 12 years, 7,637 of the people in the study had developed heart disease.
Weight appeared to be a risk factor.
