Endocrine
c. 1550 BCE — Ancient Egypt, Ebers Papyrus
Elevated blood sugar was observed and puzzled over by healers across multiple ancient civilizations, who struggled for centuries to understand why certain patients wasted away despite consuming large quantities of food and drink. The condition's connection to a failing internal mechanism was not grasped until the modern era, though ancient physicians documented its most dramatic manifestations with surprising precision. The long road toward biochemical understanding wound through anatomy theaters, animal experiments, and eventually the isolation of a transformative pancreatic substance in the twentieth century.
Historical Narrative
Among the earliest written references to what physicians would eventually connect to disordered blood sugar appear in the Ebers Papyrus, an Egyptian medical document dating to roughly 1550 BCE, which described a condition of excessive urination and wasting for which healers prescribed remedies blending botanical ingredients and ritual invocations. Indian physicians of the Ayurvedic tradition, writing between approximately 600 BCE and 600 CE, recognized a condition they called madhumeha, meaning honey urine, noting that the urine of afflicted individuals attracted ants and insects — an empirical observation that pointed, without the authors realizing it, toward abnormally high sugar content. The Greek physician Aretaeus of Cappadocia, writing in the second century CE, coined the term diabetes, derived from the Greek word for siphon, because patients seemed to melt away into urine; he described the suffering of these individuals in vivid clinical terms and regarded the condition as a mysterious and generally fatal affliction of the kidneys.
For the following millennium, European medical understanding remained largely derivative of Greek and Roman sources. Medieval Islamic scholars, particularly Avicenna in his Canon of Medicine completed around 1025 CE, synthesized earlier knowledge and added observations about abnormal appetite and the characteristic sweetness of urine, though the mechanism behind these phenomena remained wholly obscure. European physicians of the medieval period continued to rely on uroscopy — the visual and occasionally gustatory examination of urine — as a primary diagnostic tool, and the sweet taste of diabetic urine was noted by several practitioners without yielding any deeper insight into its cause.
The seventeenth century brought a crucial step forward when the English physician Thomas Willis formally rediscovered and documented the sweetness of urine in patients with the wasting disease, distinguishing this sweet variety from other forms of excessive urination. Willis described the urine as wonderfully sweet, like sugar or honey, which helped differentiate what later generations would call diabetes mellitus from diabetes insipidus. His observations reinvigorated European medical interest in the condition after centuries of relative stagnation.
The anatomical era of the eighteenth and nineteenth centuries gradually shifted attention toward the pancreas. In 1788, the English physician Thomas Cawley published an autopsy report suggesting damage to the pancreas was associated with the diabetic condition, planting a seed that would take more than a century to bear fruit. The German pathologist Paul Langerhans identified distinctive clusters of cells within the pancreas in 1869, though he did not speculate on their function; these clusters were later named the islets of Langerhans in his honor.
By the late nineteenth century, German researchers Josef von Mering and Oskar Minkowski demonstrated in 1889 that surgically removing the pancreas from dogs produced severe diabetic symptoms, conclusively linking the organ to blood sugar regulation. This experimental breakthrough transformed medical understanding of the condition's origin. French researcher Édouard Laguesse subsequently hypothesized in the 1890s that the islets of Langerhans secreted an internal substance governing sugar metabolism.
The culminating historical chapter unfolded in 1921 and 1922 in Toronto, where Frederick Banting and Charles Best, working in the laboratory of John Macleod, successfully isolated the pancreatic secretion that Banting called isletin and that was subsequently renamed insulin. Their extraction and administration of this substance to a dying fourteen-year-old patient in January 1922 marked the end of the condition's status as an invariably fatal disease and was recognized when Banting and Macleod received the Nobel Prize in Physiology or Medicine in 1923.
Key Historical Figures
Historical narrative only — this page describes how Hyperglycemia was understood historically. It is not medical advice and does not describe current diagnosis or treatment. Sourced from verified medical history references (NIH, Encyclopaedia Britannica, and standard medical history texts). See our medical disclaimer.