Cancers can be prevented if people kept to a normal weight

 Excess weight linked to 10 different cancers

Cancers have many causes – some of them genetic and some environmental. But the researchers, from the London School of Hygiene and Tropical Medicine (LSHTM) and the Farr Institute of Health Informatics, have taken account of all the other factors involved in order to come up with a good estimate of the actual number of cancers that could be prevented if people kept to a normal weight.

http://www.theguardian.com/society/2014/aug/14/excess-weight-linked-cancer-uk-obesity-researchers