After decades of research showing the impossibly close link between obesity and heart problems، a Swedish study has finally proven what we've long suspected: Excess weight does cause heart disease، as the Daily Mail said.
Obesity alone - without other risk factors like high cholesterol، inactivity and diabetes - raises a person's risks of heart disease by nearly a third، previous research has shown.
At last، the Karolinska Institute researchers used a method called Mendelian randomization prove that high BMI is a direct cause of heart disease.
And that meas that a third of the world's population - the proportion of humans that are now overweight or obese - could be on a path toward the number one cause of death without lifestyle changes and medical interventions. The first study of its kind was based on hundreds of thousands of Britons and a revolutionary statistical technique called Mendelian randomization.
This enabled the Swedish team to use genetic variants as a tool to show the causal relationship between cardiovascular disease and BMI (body mass index).
In particular، they discovered as BMI and fat mass increased so did the risk of many more than half a dozen conditions - especially aortic stenosis.
This where the valve controlling the flow of blood from the heart to the body's largest blood vessel، the aorta، narrows and fails to open fully.
If left untreated it can lead to serious problems - and even death.