Contact Us

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Please use this form to submit questions to the OHS. If you feel you need more information than what is provided on this website, please call 1-866-606-0686 to speak with a member of our Study Team. Our call centre is open Monday to Friday from 9 a.m. to 5 p.m. Please note that if you leave a voicemail, an OHS call centre responder will return your call. If you are not available at that time, the OHS will leave a voicemail for you if the feature is available.

Ontario Health Study
MaRS Centre, 661 University Avenue, Suite 510
Toronto, ON Canada M5G 0A3
Phone: 1-866-606-0686
Email: info@ontariohealthstudy.ca