Ontario Health Study - Home
8,184 Ontarians
have joined so far, WILL YOU?
Sign up online starting this Fall!

Starting this fall, participants will be able to complete Ontario Health Study questionnaires online and submit a saliva sample by mail. 

Call 1-866-606-0686 to pre-register.

Read more about our plans for this coming Fall and Winter.

Have you ever wondered why some people
get cancer or heart disease but others don't?

The Ontario Health Study is a long-term study that began in Spring 2009. Its goal is to help learn more about the causes of chronic diseases and how to prevent them.

We are recruiting Ontario residents to look at their health status, family medical histories, work, community and living environment. This not-for-profit Study is one of several across the country that are following 300,000 Canadians for the next 20 years.

Just as thousands of people in past studies have helped provide you with better care today, this is your chance to help make a difference for future generations.