Join the fight against cancer and chronic disease!

The Ontario Health Study (OHS) is a long-term Health study following the health of more than 230,000 Ontarians collecting data through questionnaires, blood samples and physical measurements. The goal is to build a platform that researchers can use now and decades into the future to better understand the causes of cancer and chronic disease.

Find out more


Discovery—It's in your blood.

Provide a blood sample to the Ontario Health Study.

Click here to learn more.

Tell us how you're doing.

Update us on your health by filling out our first follow-up questionnaire.

Click here to learn more.


Is the OHS coming to your community?

Hamilton Area Study Centre
Royal Canadian Legion, Valley City Branch 36,
280 King Street West, Dundas, Ontario L9H1W1

February 15-16, 2017
Wednesday, February 15, 9am-7pm
Thursday, February 16, 8am-4pm

This location is wheelchair accessible.
Please note that only blood samples will be collected at this location.

Sign up for the Study and book an appointment

Already an OHS Participant? Login to book an Appointment

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