The initial AI verdict was softened after source quality and evidence strength were reviewed.

Verdict TRUE

TRUE — Insulin was discovered in 1921 by Frederick Banting and Charles Best at the University of Toronto

Verified on April 11, 2026

Scientific and historical records confirm Banting and Best successfully isolated insulin in July 1921. Banting and Best successfully isolated insulin from pancreatic tissue in July 1921.

Confidence62%

How strongly independent, cited sources support this verdict.

Claim reviewed

Insulin was discovered in 1921 by Frederick Banting and Charles Best at the University of Toronto.

Analysis summary

Scientific and historical records confirm Banting and Best successfully isolated insulin in July 1921.

Evidence profile

Key findings

Banting and Best successfully isolated insulin from pancreatic tissue in July 1921.
The discovery led to the first successful human treatment in January 1922.

Sources

Analyzed across 2 independent publishers

Frederick Banting & Charles Best Isolated Human Insulin on July 27, 1921 UMass Chan Medical School

Medium credibility 63/100

Institutional domainSubstantial headlinePublisher identified

The Discovery of Insulin University of Toronto

Low credibility 32/100

Standard web sourcePublisher identified

Citations

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