🔬 Discovery

Insulin

Insulina

Date
1921-1922 · confidence high
Place
University of Toronto, Canada
Credited to
Frederick Banting, Charles Best, James Collip and John Macleod
People
👤 Charles Best1899–1978👤 Frederick Grant Banting1891–1941👤 James Collip1892–1965👤 John MacLeod1913–1984
Field
Life & health

⚠️ Disputed: the sources disagree.

What was discovered

A pancreatic extract that lowered blood sugar in dogs and saved the boy Leonard Thompson in January 1922. It turned type 1 diabetes from a death sentence into a chronic disease.

The 1923 Nobel Prize went to Banting and Macleod; Banting shared his prize with Best and Macleod with Collip. Nicolae Paulescu had published similar results months earlier.

What it led to

  • treatment of millions of diabetics
  • the biological pharmaceutical industry (Eli Lilly)
  • the first protein to be sequenced (Sanger, 1955)
  • the first recombinant DNA drug (Humulin, 1982)
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Made possible

📄 Original publication

The internal secretion of the pancreasFredrick Banting, CHARLES HERBERT BEST · Journal of Laboratory and Clinical Medicine · 1922

Links

Sources✓ verified 2026-09-25