Edward Adelbert Doisy

Edward Adelbert Doisy an American biochemist.

Nobel Prize recipient in Physiology or Medicine, shared with Henrik Dam, who discovered Vitamin K’s role.

Co-Discoverer of Vitamin K. Co-Discoverer of Estrogen Research.

He isolated and characterized the chemical structure of Vitamin K (K₁ and K₂), essential for blood clotting.

He also conducted pioneering research on hormones, isolating estrogenic hormones such as estrone and estriol.

His discoveries greatly advanced the understanding of reproductive physiology.
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