Back to Top

What’s New With the OHS?

Since 2010, the Ontario Health Study (OHS) has been working hard to build a platform for chronic disease research. Working together with the research community and Ontarians across the province we are now following the health of about 225,000 people and have collected more than 40,000 blood samples. We’re building a database of health information and a biobank so researchers can better understand the link between genetics, lifestyle and environment—and the role they play in our health.

In this section, you’ll find information about the various Study activities and upcoming initiatives.

Blood tubes in the laboratory centrifuge

The Ontario Health Study Newsletter, June 2026

Jun 11, 2026 // OHS Newsletter

In this issue: • The HEAL Study is here • More opportunities to be included in research by Canada’s largest health study • New book “Nature and the Mind” highlights OHS-based research • New Ontario registry supports families with hereditary cancer risk • Second Blood Sample Collection – Progress update • Have you moved, or

News Image

Updates to the OHS Access Policy

Jun 8, 2026 // Study Updates

OHS Access Policy (v3) updates In March 2026, the OHS released an updated Access Policy. It revises existing sections and adds content to better support current and future Applicants and Approved Users of OHS Data and Biosamples. All potential Applicants should review the Access Policy before requesting access. Key updates are summarized below. Ontario Health

News Image

OHS participants contributed to research on Endocrine Disrupting Chemicals (EDCs) – Video presentation

Feb 27, 2026 // Study Updates

 Data from more than 9,000 OHS participants were used in a recent study looking at how workplace exposure to endocrine disrupting chemicals* (EDCs) can impact cancer risk. High doses of EDCs can disrupt sex hormones, such as estrogens and testosterone, and this exposure can play a role in the development of certain cancers.  

News Image