A study says vegetables may not greatly cut the risk of heart attacks. People believe vegetables are important. However, other things may affect our heart. These include other things we eat, exercise, where we live, our income, and if we smoke or drink. Almost 400,000 answered questions in the study.

The scientists said the risk of dying from heart disease was 15 per cent lower for people who ate the most vegetables. However, they said other things also caused the 15% reduction. A researcher said the study did not show that vegetables protected the heart. He said differences in money and lifestyle also affected the heart.