Health Information

Cancer Prevention for Adults

Everyone has a certain risk of developing cancer. Your risk increases or decreases depending on the choices you make and the ways in which your environment supports you.

There are three big ways you can lower your risk of cancer – healthier lifestyles, keeping immunizations up-to-date, and routine cancer screening.


If all of us adopted healthier lifestyles, we could prevent about 2 out of 3 cancers in Canada¹. Changing your lifestyle to reduce your cancer risk can seem hard, but beginning with small steps every day can make a big difference. Smoking, poor dietary habits, and physical inactivity account for more than 50 per cent of all cancers in Ontario².

While you can’t change some things, like your age or your family history, there are many factors you may be able to control.

Up to 50 per cent of cancers could be prevented by a healthy lifestyle (e.g., being smoke-free, being active, drinking less alcohol, and eating well) and by avoiding exposures to cancer-causing substances at work and in the environment³.


There are many vaccines that can help to prevent cancers. Keeping your immunizations up-to-date is an important part of reducing your cancer risk.

Cancer Screening

Early stages of cancer can be difficult for you to see or feel, so regular screening can find some cancers sooner. Early detection can improve your chances of survival. Visit your health-care provider to talk about screening for breast, cervical, colorectal and other cancers.

Reduce your risk by:

Learn how to reduce your risk of cancer.

  1. Canadian Cancer Society
  2. Seven More Years: Impact of smoking, alcohol, diet, physical activity and stress on health and life expectancy in Ontario
  3. Cancer Care Ontario