A recent study has shown that the risk of cancer is high for obese people. During studies conducted on mice, it was observed that when mice lost a bit of weight it helped cut down risk of some cancers, even when the weight loss was not the result of exercise; even liposuction was enough, as revealed in the mice study.
Allan Conney and his colleagues at Rutgers University in New Jersey cut off the superfluous fat from some mice and subjected them to UV light. This damaged some of their skin cells and caused sunburn. The fat reduction gave a thrust to apoptosis, helpful cell suicide, in skin tumor cells. Mice which were maintaining weight and kept slim with exercise also derived the same benefit, though there was no tangible effect on non-cancerous cells in any of the mice.
The US National Cancer Institute has reported that nearly 3% of all new cancers in the United States are related to obesity. Ample evidence is also available that keeping trim can significantly reduce the risk of cancer.