John Macleod

John Macleod was a Scottish-American physiologist best known for co-discovering insulin in 1921, alongside Frederick Banting. His work was crucial in isolating and understanding insulin's role in regulating blood sugar, which transformed diabetes treatment. Despite his significant contributions, Macleod’s role was sometimes misunderstood as overshadowing Banting’s, but both received the Nobel Prize in Physiology or Medicine in 1923. His research advanced medical science by enabling effective management of diabetes, saving countless lives and laying a foundation for future endocrine research.