Prior to the 1920s, a diagnosis of type 1 diabetes was, in effect, a death sentence, with patients, most often children, typically surviving only a few years after their symptoms first appeared, sustained largely by severely restrictive, near-starvation diets that could delay but never prevent the disease's fatal progression. This grim outlook changed dramatically in 1921 and 1922, when a team of researchers at a Canadian university successfully isolated insulin, the hormone responsible for regulating blood sugar levels, from animal pancreases, and demonstrated that its administration could effectively control the previously unmanageable symptoms of diabetes. The transformation in patient outcomes was so immediate and dramatic that early clinical demonstrations became legendary within the medical community; one frequently recounted account describes a hospital ward filled with comatose, dying children who, following insulin injections, began regaining consciousness and visibly improving within hours, in a scene that reportedly moved even experienced physicians to tears. The discovery earned its principal researchers the Nobel Prize in Physiology or Medicine remarkably quickly, within just a year of their initial breakthrough, an unusually rapid recognition that reflected the discovery's immediate and undeniable life-saving impact. Notably, the discoverers chose to sell the patent for insulin to their university for a token sum of one dollar, explicitly to ensure the treatment would remain affordable and widely accessible rather than becoming a source of significant personal profit. Insulin therapy has since been continuously refined, though the fundamental treatment approach established in the 1920s remains the foundation of diabetes management today.