Being obese boosts the risk of half a dozen types of cancer, and the odds increase as one's waistline expands, according to a major review published on Saturday by The Lancet.
Doctors at the University of Manchester, northwestern England, trawled through 141 studies that monitored the health of 282,000 people who gained weight.
Their benchmark of fat was the body mass index (BMI), in which the individual's weight in kilos is divided by the square of the person's height in metres. Individuals with a BMI of 25-29.9 are considered overweight, while those with a BMI of 30 or more are obese.
The investigators found that every gain of five points in BMI among men raised the risk of esophageal cancer by 52 percent, of thyroid cancer by 33 percent and of colon and kidney cancers by 24 percent........................