Obesity is defined as an adult with a BMI of 30 or more.
A healthy person’s BMI – calculated by dividing weight in kg by height in meters, and the answer again by height – is between 18.5 and 24.9.
In children, obesity is defined as being in the 95th percentile.
The percentile compares youth to other people of the same age.
For example, if a three-month-old baby is in the 40th percentile of weight, it means that 40 percent of three-month-old babies have a weight equal to or less than that baby.
About 58 percent of women and 68 percent of men in the UK are overweight or obese.
This situation costs the NHS £6.1 billion out of a budget of approximately £124.7 billion each year.
It increases the risk of many life-threatening conditions of a person due to obesity.
Such conditions include type 2 diabetes, which can lead to kidney disease, blindness and even limb amputation.
Research shows that in the UK at least one in six hospital beds are taken up by a diabetic patient.
Obesity also increases the risk of heart disease, which kills 315,000 people in the UK each year – making it the number one cause of death.
Lifting dangerous amounts of weight has also been linked to 12 different cancers.
This includes the breast, which affects one in eight women at some point in their lives.
In children, research shows that 70 percent of obese youth have high blood pressure or elevated cholesterol, putting them at risk for heart disease.
Obese children are also more likely to become obese adults.
And if children are overweight, their obesity is often more severe in adulthood.
One in five children in the UK start school because of being overweight or obese, which rises to one in three by the age of 10.
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