Alcohol makes cancer grow in the liver, mouth, esophagus and is so clearly linked to breast cancer some doctors suggest women with a family history should not drink at all. Smoking is another habit most people pick up in their teens. Tobacco is classified as a group A level carcinogen. That means there is no known safe level of exposure. And according to a recent study published by Health Canada, active and passive smoking has been also been linked with breast cancer.
Smoking is the single leading cause of cancer deaths.
And yet some people smoke all their lives and never develop cancer. Is there something in their genetic makeup that has helped them escape. Dr. Narod thinks it may be nothing more than pure luck. The current estimate is probably 30 per cent. That's up to you.