Before the early 1920s, being diagnosed with Type 1 diabetes was essentially the beginning of the end. The doctors could only offer one grim treatment: a near-starvation diet that delayed the inevitable by months or years. As their bodies failed to process sugar, patients, many of whom were young children, grew weak and skeletal, eventually slipping into fatal comas.
The breakthrough that turned diabetes from a deadly disease into a manageable condition did not come from a prestigious research lab. A sweltering, makeshift lab in a humid summer was run by an obscure, short-tempered Canadian surgeon without any research experience.
It was Dr. Frederick Banting who did that.
Dedicated to solving a medical mystery, Banting battled personal debt, professional skepticism, and personal feuds to discover insulin. Although he made one of the greatest scientific discoveries in history, he refused to use it for personal gain. As opposed to selling his rights for a single dollar, he declared that it belonged to the world.
Frederick Banting’s life and his chaotic search for insulin are the foundation of this unforgettable tale.
The Early Years and the Battlefields of World War I
In 1891, Frederick Grant Banting was born on a farm in Alliston, Ontario, Canada. As the youngest of five children, Banting grew up with a strong sense of independence and a stubborn streak. The first thing he did was enroll at Victoria College in Toronto to study divinity, but he soon discovered that medicine was his true calling. Upon completing his undergraduate studies, he transferred to the University of Toronto to pursue a medical degree.
During World War I, Banting enlisted in the army immediately, but was rejected due to his poor eyesight. Insisting on serving, he tried again and was eventually accepted into the Canadian Army Medical Corps.
When Banting was sent to the front lines in France, he demonstrated the fierce courage and temper that would define the rest of his life. In 1918, while tending to casualties under heavy fire during the Battle of Cambrai, he was severely wounded in the right arm by shrapnel.
Despite his injuries, Banting refused to step back, continuing to help other wounded soldiers for sixteen continuous hours until another surgeon physically ordered him to stop. While he received the Military Cross for his bravery, the physical and emotional scars of the war remained with him forever.
A Midnight Epiphany
As soon as Banting returned to Canada after the war, he established a surgical practice in London, Ontario. There was a slowdown in business, and he had difficulty paying his bills. A part-time job teaching anatomy and physiology at Western University of Canada supplemented his income.
In the evening of October 31, 1920, Banting was preparing a lecture for his students about the pancreas. The article he was reading about pancreatic stones and the organ’s secretions made him fall asleep. Two in the morning, Banting woke up suddenly with an idea in his head.
As he reached for his bedside table notebook, he scribbled a brief note:
Ligate pancreatic ducts of dog. Keep dogs alive till acini degenerate leaving islets. Try to isolate internal secretion of these to relieve glycosuria.
The pancreas has played a central role in controlling blood sugar for decades, according to scientific experts. Previous attempts to extract the active hormone failed because the digestive enzymes produced by the pancreas destroyed the delicate hormone.
Banting had a simple idea: if he tied off (ligated) the pancreatic ducts of a living animal, the digestive tissue would wither away, leaving only the hormone-producing cells, called Islets of Langerhans, intact. It was then possible for him to safely extract the secret internal secretion.
One problem: Banting was an orthopedic surgeon, not a researcher in endocrinology. His lab was small, he lacked research funding, and he had no experience in advanced biochemistry.
A Sweltering Summer in 1921: Heat, Temper, and Breakthroughs
Dr. John Macleod, a world-renowned professor of physiology at the University of Toronto and an expert on carbohydrate metabolism, decided to test Banting’s theory.
There was a deep sense of skepticism in Macleod. His warning was based on the fact that far more experienced scientists had failed to solve the problem, and that Banting’s lack of research training would be a major handicap. Banting, however, was notorious for his persistence. In the end, Macleod relented after he badgered him for a long time.
Banting had access to an unused, cramped laboratory room on the top floor of the university medical building, ten experimental dogs, and Charles Best, a 22-year-old medical student skilled at measuring blood glucose levels. The two young men were left to work alone when Macleod left Toronto for a summer holiday in Scotland.
During the summer of 1921, the work was grueling. No proper ventilation was provided in the small lab, which resulted in intense heat and humidity. Despite being broke, Banting did not have much savings and worked around the clock. Charles Best possessed a calm, methodical temperament, whereas he possessed a fiery temper. As a result of their exhaustion and shared purpose, the pair formed a tight bond despite their contrasting personalities.
Their experimental dogs were operated on delicately under difficult conditions by Banting and Best. By tying off the pancreatic ducts, waiting for the digestive glands to degenerate, and extracting a fluid from the remaining islets, they succeeded in removing the pancreatic fluid.
These murky extracts-which they initially called “isletin”-were injected into diabetic dogs who had fallen into comas and showed extraordinary results. After hours, the dog’s blood sugar level plummeted to normal, and it regained its strength, standing up and wagging its tail.
The extract had proven effective in controlling the disease.
The conflict in the lab and the addition of Collip
Macleod realized that Banting and Best had accomplished something extraordinary when he returned from Scotland in the autumn. Macleod expanded his team after realizing that their murky extract was still too crude and toxic for human trials. James Collip, a brilliant biochemist, purified the extract so it could be safely injected into humans.
There were intense personality clashes as a result of the rapid expansion of the team. Macleod deeply suspicious of Banting, fearing that the senior professor was trying to take credit for an idea that had originated in Banting’s small room.
Banting’s temper flared frequently. When Banting believed Collip kept secrets regarding the chemical purification process, a heated argument escalated into a physical confrontation in the lab, with Banting grabbing Collip by the collar before colleagues separated them.
Even though chaos and infighting prevailed, the team pushed forward. The process of purification was refined by Collip, resulting in a clear solution that could lower blood sugar without causing severe toxic reactions.
Late in 1921, insulin, which comes from the Latin word insula, was officially renamed.
Ward 50: The First Human Miracle
The Toronto General Hospital began clinical trials in January 1922.
On Ward 50, they encountered Leonard Thompson, a 14-year-old boy who was near death. Despite weighing just 65 pounds, Leonard was severely malnourished, drifting in and out of a diabetic coma. He received permission from his father to undergo the experimental treatment.
Initially, Banting and Best’s crude extract caused an allergic reaction without significantly lowering his blood sugar levels. Collip’s newly purified insulin made them try again a few days later.
Miracles happened as a result. Leonard’s blood sugar dropped quickly, his energy returned, and his toxic ketones disappeared. In the end, he died of pneumonia at the age of 27 after living another thirteen years.
Pediatric diabetic wards were filled with dying children in comas as doctors walked around. Children began waking up from their comas even before the scientists had finished injecting the life-saving extract into the last bed in the ward as the researchers moved from bed to bed. Previously, there had been no cure for a disease that had been an automatic death sentence for centuries.
A One-Dollar Patent that Puts Science Above Profit
As news of the medical breakthrough spread across the globe, pharmaceutical companies saw a massive commercial opportunity. Millions of dollars in steady revenue were promised by a reliable cure for diabetes.
In 1923, Banting, Best, and Collip were granted the original patent for insulin. Medical discoveries that benefit the public, however, should never be exploited for personal gain, according to Banting. A life-saving treatment should not be profit-oriented, according to his deep ethical convictions.
According to Banting:
Insulin is not mine, it belongs to the whole world.”
The insulin patent was sold by Banting, Best, and Colllip for the symbolic fee of just one dollar, demonstrating incredible selflessness.
Through the use of patent rights, the university established non-exclusive production licenses with manufacturers around the world, allowing insulin to be produced and distributed at affordable prices.
An Overview of Nobel Prize Drama and Recognition
Frederick Banting and John Macleod were awarded the Nobel Prize in Physiology or Medicine in 1923 for discovering insulin.
The fury of Banting was palpable. During that hot summer, Charles Best worked side by side with Macleod during each long night while Macleod merely provided laboratory space. Initially, Banting threatened to decline the award altogether in protest against Best’s exclusion.
It was eventually friends who persuaded Banting to accept the honor, arguing that to reject it would diminish Canadian pride. The Nobel Prize money was to be split directly between Banting and Charles Best, but Banting immediately took a stand.
Macleod shared his prize money with James Collip in response to Banting’s noble gesture. One of the most famous examples of scientific integrity and loyalty among research partners still exists today.
Physiology or Medicine’s youngest Nobel laureate, Banting became, and remains, the youngest in history at the age of 32.
Life in Later Life and Tragic Ending
The Canadian government established the Banting Research Foundation after the insulin breakthrough and granted him a life annuity so he could pursue his scientific interests without financial worries. Sir Frederick Banting became Sir Frederick Banting in 1934 after being knighted by King George V.
Despite his fame, Banting was a complex, deeply practical individual who disliked public speaking and grand celebrations. While pursuing cancer, silicosis, and aviation medicine research in his later years, he also painted landscapes alongside members of Canada’s Group of Seven.
Banting felt compelled to serve his country again when World War II broke out in 1939. Research on high altitude survival and protective flying suits was coordinated by him as part of the military medical effort.
Banting was traveling to England on an official wartime mission aboard a Hudson bomber on February 21, 1941. A short time after taking off from Newfoundland, the aircraft suffered catastrophic engine failure and crashed in a remote area covered in snow. Despite surviving the initial impact, Banting died as a result of his injuries and exposure before rescue teams could reach him. His age was 49.
The key takeaways from Banting’s journey
Frederick Banting leaves behind a tumultuous, inspiring life that has several powerful lessons for modern society and science:
- The more compelling your conviction, the more successful you will be: Banting succeeded not because he was the most experienced scientist, but because he pursued a new hypothesis with relentless determination when he knew others had given up.
- A true leader shares credit: Banting refused to accept sole responsibility for a team effort, publicly splitting his Nobel Prize money with his assistant.
- Putting humanity over financial gain: Banting set the gold standard for scientific altruism by selling a groundbreaking patent for a dollar.
- Banting proved that great breakthroughs often emerge from extreme hardships through resilience through adversity: from shrapnel on the battlefield to cramped, under-funded laboratories.
Lastly,
Sir Frederick Banting was anything but a quiet, conventional academic. A headstrong, blunt, and passionate fighter, he refused to let bureaucracy or scientific doubt get in the way of saving lives.
As a result of his discovery of insulin, millions of people were saved from premature death and the landscape of modern medicine was transformed. Despite his laboratory success, his legacy will be defined just as much by his character as by his achievements. As a result of giving away his patent for one dollar, Banting demonstrated that medicine’s true purpose is to heal humanity. His legacy continues to inspire researchers throughout the world to this day.
