Smoking(01 of11)
Open Image ModalIt's no surprise smoking is the number one thing to avoid in order to prevent cancer. It's responsible for 30 per cent of all cancer deaths, and smoking can increase the risk of lung cancer, for example, by nine times. (credit:Hemera Technologies via Getty Images)
Secondhand Smoke(02 of11)
Open Image ModalEven if you don't smoke, you can be affected by those around you. People who are near smoking are 1.4 times more likely to get lung cancer than others. (credit:CMSP via Getty Images)
Excess Body Weight(03 of11)
Open Image ModalNot having a healthy body weight (defined generally as a BMI of lower than 25) can increase your risk for a variety of cancers, including esophageal, uterine, liver, kidney, pancreatic, breast and colorectal cancer. (credit:bowie15 via Getty Images)
How You Eat(04 of11)
Open Image ModalIt's a big yes for veggies and fruit, as well as fibre, but red and processed meat is what you want to avoid. While eating lots of fibre, for example, can help reduce colorectal cancer risk, eating the meats can increase it. (credit:Maximilian Stock Ltd. via Getty Images)
Drinking(05 of11)
Open Image ModalDrinking any type of alcohol — at all — increases your risk for head/neck, esophageal, colorectal, breast and liver cancer (and potentially pancreatic too). You can decrease the risk by keeping your alcohol use confined to one drink a day for women, and two for men. (credit:Roy Mehta via Getty Images)
Physical Activity(06 of11)
Open Image ModalGetting at least 30 minutes of physical activity every day is what you should be aiming for. Otherwise, you're at risk for colorectal cancer and could be setting yourself up for lung, uterine and breast cancer. (credit:Brent Winebrenner via Getty Images)
How Much You Sit(07 of11)
Open Image ModalWe've heard about many ways in which sitting is bad for your health, but this could be the scariest one. Sitting too much (which is different from having physical activity) can increase your risk for colorectal, uterine, ovarian and prostate cancer. (credit:Science Photo Library via Getty Images)
UV Radiation(08 of11)
Open Image ModalAny type of tanning increases your risk for skin cancer — up to 64 per cent more for squamous cell carcinoma. (credit:Bruce Yuanyue Bi via Getty Images)
Viruses(09 of11)
Open Image ModalHepatitis B and HPV both increase the risk for cancer, but there are vaccines that can help prevent them. (credit:Martin Botvidsson via Getty Images)
Radon(10 of11)
Open Image ModalThe presence of radon gas is associated with an increased risk for lung cancer — test your home to see if it's there. (credit:Zirafek via Getty Images)
Hormones(11 of11)
Open Image ModalThis one is a double-edged sword. For women taking HRT post-menopause, it can increase the risk of breast, uterine and ovarian cancer, but may help decrease the risk for colorectal cancer. Birth control pills, meanwhile, have been associated with an increased risk for breast, cervical and liver cancer, but a decreased risk for uterine and ovarian cancer. If you're concerned, talk to your doctor about options. (credit:Stephan Zabel via Getty Images)