Each $2 Discovery of Insulin 100th Anniversary Coloured Toonie coin serves as a lasting reminder of how a Canadian medical breakthrough has had an immeasurable global impact over the last century. The $2 coin’s reverse is double dated (“1921 2021”) to commemorate the 100th anniversary of a Canadian medical innovation. The discovery of insulin at a University of Toronto laboratory is represented by a maple leaf and traditional symbols: an early insulin vial, an Erlenmeyer flask, a mortar and pestle. The inner core shows insulin in monomeric form, which is highlighted in blue on these coloured coins, while the depiction of the hormone at work in the bloodstream extends onto the outer ring.
