Vitamin E is a fat-soluble vitamin that is believed to protect the body from many diseases, including cancer. It can be found in the diet by eating foods such as beans, nuts, grains, and wheat germ.
One article (1) looked into the risk of getting cancer in patients who were at risk for the disease. They found that vitamin E is a potent antioxidant. Anything that is an antioxidant can fight cancer by scavenging for oxygen free radicals that can alter the structure of DNA, leading to a cancerous cell.
As a potent antioxidant, vitamin E can prevent cancer by making sure that toxic substances don’t cause cellular damage. Research has suggested that those who are low on vitamin E have a greater risk of developing cancer.
Source: 1.How vitamin E protects against cancer. https://www.pcrm.org/health/cancer-resources/diet-cancer/nutrition/how-vitamin-e-helps-protect-against-cancer. Accessed 9/13/16.