New series 1/4. Since the 1950s, doctors have been continuously researching people's health and lifestyle.
Richard Hannaford examines the results of these studies.
Heart Disease. Because of the Seven Countries Study in the 1950s, we know that diet and exercise reduce heart attacks. This study launched a project in Finland that cut cholesterol levels by 82 per cent but is proving difficult to replicate here. Producer Helen Sharp Repeated tomorrow at 4.30pm