They followed people with and without nonmelanoma skin cancer for more than 16 years from 1989 to 2005, to see the risk of developing other types of malignancies (non-skin cancers). What they found was:
People who had been diagnosed with either basal cell or squamous cell skin cancer had double the risk of developing another type of cancer when compared to those with no history of the disease.
Now, according to Dr. Fuhrman, “People who eat a cancer-promoting diet will always be at risk of multiple cancers. The important message here is that skin cancer is caused by a low micronutrient diet in combination with the increased free radical damage from sun exposure.”