Researchers at the <a href="https://en.wikipedia.org/wiki/University_of_Toronto" id="mwtQ" rel="mw:WikiLink" title="University of Toronto">University of Toronto</a>, led by <a href="https://en.wikipedia.org/wiki/Biochemist" id="mwtg" rel="mw:WikiLink" title="Biochemist">biochemist</a> <a href="https://en.wikipedia.org/wiki/Frederick_Banting" id="mwtw" rel="mw:WikiLink" title="Frederick Banting">Frederick Banting</a>, prove that the <a href="https://en.wikipedia.org/wiki/Hormone" id="mwuA" rel="mw:WikiLink" title="Hormone">hormone</a> <a href="https://en.wikipedia.org/wiki/Insulin" id="mwuQ" rel="mw:WikiLink" title="Insulin">insulin</a> regulates <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Blood_sugar" id="mwug" rel="mw:WikiLink" title="Blood sugar">blood sugar</a>.