Weight Gain, Obesity & Cancer Risk

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Excess weight is a known risk factor for many chronic diseases, such as diabetes and heart disease. Obesity can also be linked an increased risk for developing some cancers. To clarify the effects of weight gain on cancer risk, researchers in 2007 conducted an analysis of many studies reported in medical journals that describe 282,137 cases of cancer. The researchers wanted to see if weight gain had an effect on the risk for certain cancer types.

In particular, the researchers looked at the risk of cancer associated with a weight gain corresponding to an increase of 5 kg/m2 in body mass index (BMI). In terms of actual pounds gained, a man with a normal-range BMI of 23 would need to gain 15 kg (33 lbs.) of weight, while a woman with a BMI of 23 would need to gain 13 kg (28.6 lbs.) to correspond to an increase of 5 in the BMI.

Medically Reviewed by a Doctor on 10/21/2015