Alexander Leaf (April 10, 1920 – December 24, 2012) was a physician and research scientist best known for his work linking diet and exercise to the prevention of heart disease. He also contributed significantly to establishing the relationship between longer, hotter summers and outbreaks of infectious diseases like

malaria Malaria is a Mosquito-borne disease, mosquito-borne infectious disease that affects vertebrates and ''Anopheles'' mosquitoes. Human malaria causes Signs and symptoms, symptoms that typically include fever, Fatigue (medical), fatigue, vomitin ...

in regions previously unaffected by them. Alexander Leaf was born Alexander Livshiz on April 10, 1920, in

Yokohama, Japan is the second-largest city in Japan by population as well as by area, and the country's most populous municipality. It is the capital and most populous city in Kanagawa Prefecture, with a population of 3.7 million in 2023. It lies on Tokyo B ...

. His family had fled there after the

Bolshevik Revolution The October Revolution, also known as the Great October Socialist Revolution (in Soviet historiography), October coup, Bolshevik coup, or Bolshevik revolution, was the second of two revolutions in Russia in 1917. It was led by Vladimir L ...

. The family name was changed when they emigrated to

Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...

in 1922. After graduating from

University of Washington The University of Washington (UW and informally U-Dub or U Dub) is a public research university in Seattle, Washington, United States. Founded in 1861, the University of Washington is one of the oldest universities on the West Coast of the Uni ...

as a chemistry major in 1940, Dr. Leaf received his medical degree from the

University of Michigan The University of Michigan (U-M, U of M, or Michigan) is a public university, public research university in Ann Arbor, Michigan, United States. Founded in 1817, it is the oldest institution of higher education in the state. The University of Mi ...

in 1943, completing his internship and residency at

Massachusetts General Hospital Massachusetts General Hospital (Mass General or MGH) is a teaching hospital located in the West End neighborhood of Boston, Massachusetts. It is the original and largest clinical education and research facility of Harvard Medical School/Harvar ...

from 1944 to 1946. Dr. Leaf contributed significantly to the understanding of the causes of heart disease through his research on how

sodium Sodium is a chemical element; it has Symbol (chemistry), symbol Na (from Neo-Latin ) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 element, group 1 of the peri ...

and

potassium Potassium is a chemical element; it has Symbol (chemistry), symbol K (from Neo-Latin ) and atomic number19. It is a silvery white metal that is soft enough to easily cut with a knife. Potassium metal reacts rapidly with atmospheric oxygen to ...

pass through cell walls. He was chief of medical services at

from 1966 to 1981. In 1961, he became a founding member of

Physicians for Social Responsibility Physicians for Social Responsibility (PSR) is a physician-led organization in the US working to protect the public from the threats of nuclear proliferation, climate change, and environmental toxins. It produces and disseminates publications, p ...

, opposing

nuclear proliferation Nuclear proliferation is the spread of nuclear weapons to additional countries, particularly those not recognized as List of states with nuclear weapons, nuclear-weapon states by the Treaty on the Non-Proliferation of Nuclear Weapons, commonl ...

. In 1972, he became one of the first practicing physicians ever elected to the

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, NGO, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the ...

References

External links

The Alexander Leaf papers
– at Harvard Medical Library archives 1920 births 2012 deaths Members of the United States National Academy of Sciences University of Washington alumni University of Michigan Medical School alumni Japanese emigrants to the United States American people of Russian descent Members of the National Academy of Medicine {{US-med-bio-stub