A doctor’s son in Warsaw
Kazimierz Funk was born in Warsaw in 1884, when the city was part of the Russian Empire. Sources differ on the exact day; the date most often used, including for the Google Doodle that marked his 140th birthday in 2024, is February 23. His father, Jacques Funk, was a dermatologist, and his mother was Gustawa Zysan Funk. The family was Jewish, part of the large and increasingly assimilated Jewish professional class of Warsaw.
His parents hoped he would become a physician like his father. Instead, after graduating from the Warsaw gymnasium in 1900, he went abroad to study the sciences, first biology at the University of Geneva under the botanist Robert Chodat and then chemistry at the University of Bern under Carl Friedheim and Stanisław Kostanecki. He earned his doctorate in Bern in 1904, at the age of twenty, with research in synthetic organic chemistry; accounts differ on whether his thesis concerned the dyes brazilin and haematoxylin or related stilbene compounds.
A wandering apprenticeship
Like many gifted young Jews from the Russian Empire, Funk built his career by moving between the great research centres of Western Europe. He worked at the Pasteur Institute in Paris under Gabriel Bertrand, then in Berlin in the laboratory of Emil Fischer, working with Emil Abderhalden on proteins, then as a biochemist at the municipal hospital in Wiesbaden and at a paediatric clinic in Berlin. Later accounts note that his Polish Jewish origins and two world wars shaped a career spread across the United States and five European countries.
In 1910 he moved to London as a scholar at the Lister Institute of Preventive Medicine. In 1911 he published his first paper in English, on the amino acid dihydroxyphenylalanine. Then the institute’s head, Charles Martin, gave him a new problem: beriberi.
The puzzle of polished rice
Beriberi, a disease of nerves and heart that could cause paralysis and death, was common in parts of Asia where people lived largely on white, polished rice. In the 1890s the Dutch physician Christiaan Eijkman, working in the Dutch East Indies, had found that birds fed polished rice developed a similar paralysis, and that something in the discarded rice bran protected them. Most scientists of the day, steeped in the germ theory of disease, still looked for microbes or toxins as the causes of illness. The idea that a disease could be caused by the absence of something in food was only beginning to take hold; in Britain, Frederick Gowland Hopkins had suggested that diets contained essential accessory factors beyond proteins, fats, carbohydrates and minerals.
Funk set out to isolate the protective substance from rice polishings. He produced a concentrated crystalline fraction that was active against the polyneuritis of birds, and found that it behaved chemically like an amine, a nitrogen-containing compound. He believed he had isolated the anti-beriberi factor. Later work showed that his preparation was not pure thiamine, the vitamin B1 that actually prevents beriberi; much of it was nicotinic acid, later known as niacin or vitamin B3. But the conceptual leap he made from it was lasting.
Naming the vitamines
In 1912 Funk published a long paper in the Journal of State Medicine, The Etiology of the Deficiency Diseases. Ranging across beriberi, polyneuritis in birds, epidemic dropsy, ship beriberi, scurvy in animals and infants, and pellagra, it gathered the evidence and proposed that each was caused by the lack of a specific substance in the diet, at least four in all: an anti-beriberi, an anti-scurvy, an anti-pellagra and an anti-rickets factor. Because he believed these substances were vital to life and chemically amines, he called them vitamines, from vital and amine. The paper won him a Beit Fellowship to continue his research, and he later expanded his ideas into the German monograph Die Vitamine.
Hopkins had glimpsed the idea of accessory food factors, but Funk gave it a sharp theory and, crucially, a name. Within a few years it was clear that not all of these substances were amines; vitamin C, for instance, contains no nitrogen. In 1920 the British biochemist Jack Drummond proposed dropping the final e, and the word became vitamin. The term was so useful that it survived the disproof of its own chemistry. Historians of nutrition treat the 1912 paper as the point at which the word entered the world’s scientific literature, and as the first clear statement that a whole family of diseases shared a single kind of cause. The factors Funk predicted correspond to substances later identified as distinct vitamins, among them the B vitamins, vitamin C and vitamin D, each isolated and synthesised by other chemists over the following decades.
Why it mattered
Funk’s deficiency-disease theory transformed nutrition from a science of calories into a science of trace essentials. It explained why sailors got scurvy, why children in smoky northern cities developed rickets, why poor communities living on maize suffered pellagra, and why rice-eating populations were struck by beriberi. Once these diseases were understood as deficiencies, they could be prevented cheaply, by dietary change, by fortifying staple foods such as flour, rice and milk, and eventually by synthetic vitamins.
Funk himself suggested, in an article that was largely ignored, that changes in the milling of maize lay behind outbreaks of pellagra. Later research confirmed that pellagra was a deficiency disease linked to niacin, one of the very substances his early rice preparations had contained. Today the word he invented is printed on cereal boxes, milk cartons and medicine labels around the world.
Between continents
In 1913 Funk moved to the Cancer Hospital Research Institute in London, and in 1914 he married Alix Denise Schneidesch, from Brussels; they had two children. When the First World War broke out he went to the United States, arriving in 1915. There he worked in a succession of industrial laboratories, the Harriman Research Laboratory in New York, the Calco Company in Bound Brook, New Jersey, and Metz and Company, and developed Oscodal, a concentrate of vitamins A and D that was accepted by the American Medical Association. He later held a post at Columbia University’s College of Physicians and Surgeons, and in 1920 he became a US citizen.
In 1923, with support from the Rockefeller Foundation, he returned to newly independent Poland as head of biochemistry at the State Institute of Hygiene in Warsaw. Political instability there led him in 1927–28 to move to Paris, where he worked for a pharmaceutical firm and founded a research laboratory, Casa Biochemica. When Germany invaded Poland in 1939 he returned to the United States for good, working with the U.S. Vitamin Corporation; in 1940 he became president of the Funk Foundation for Medical Research.
Hormones, cancer and a wide curiosity
Vitamins were only part of Funk’s scientific life. He did significant work on hormones, including the sex hormones and those of the pituitary gland, and emphasised the interplay between hormones and vitamins in the body. He also investigated diabetes, peptic ulcers and the biochemistry of cancer, the subject that occupied his last years. Over his career he published about 140 technical papers as well as some thirty reviews and articles, and several books.
Funk never received a Nobel Prize. In 1929 the prize in physiology or medicine went to Eijkman, for the discovery of the antineuritic vitamin, and to Hopkins, for the discovery of the growth-stimulating vitamins. Funk, whose theory and word had framed the field, was not included. Later assessments have been generous: one medical textbook described his 1912 paper as a landmark publication whose theory provided a new concept for interpreting diet-related disease.
Last years
Funk spent his final decades in New York State, continuing research through his foundation. He died in November 1967, aged eighty-three; sources give his place of death as either New York City or Albany. Time magazine’s obituary called him a pioneer and paired him with Elmer McCollum, the American nutrition scientist associated with vitamin A, praising the everyday importance of both men’s work for medicine and describing Funk as a research scientist of wide curiosity.
His Jewish background was rarely discussed in accounts of his work, but it shaped his path: like many Polish Jews of his generation, he trained and built his career abroad, and he lived as an émigré through two world wars that devastated Warsaw’s Jewish community. A full-length biography, Casimir Funk: Pioneer in Vitamins and Hormones, appeared in 1955, during his lifetime.
Legacy
The Polish Institute of Arts and Sciences of America awards an annual Casimir Funk Natural Sciences Prize to Polish-American scientists; its past winners include the Nobel chemist Roald Hoffmann and the mathematician Benoit Mandelbrot. In 2024 Google marked his 140th birthday with a Doodle produced with his family’s help, and he has been posthumously honoured in the Nutrition Hall of Fame.
Few scientists have given the world a word used daily by billions of people. Funk’s word came wrapped in a powerful idea: that tiny amounts of particular substances, missing from an otherwise filling diet, could cause terrible disease, and that supplying them could prevent it. That idea has saved countless lives, from the steep decline of beriberi and pellagra to the vitamin-fortified foods that line supermarket shelves today.
Sources & further reading
Casimir Funk, Wikipedia · Casimir Funk, Encyclopedia.com (World of Scientific Discovery / Complete Dictionary of Scientific Biography) · Funk, C. (1912). The Etiology of the Deficiency Diseases. Journal of State Medicine 20: 341–368 (scan) · Who is Casimir Funk, the ‘father of vitamins’ honoured by the Google Doodle?, Euronews · PMC article on Casimir Funk and the vitamine concept · Researched from the sources above and checked against them. Spotted an error? Tell us.
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