Skip to main content

Casimir Funk

Casimir Funk

The discoverer of vitamins, Polish American biochemist Casimir Funk (1884-1967) found that vitamins B1, B2, C, and D were necessary to human health and that vitamins contributed to the normal functioning of the hormonal system. His work led to the prevention of beriberi, rickets, scurvy, and other diseases caused by vitamin deficiency.

Studied in Switzerland and Germany

Funk was born February 23, 1884, in Warsaw, Poland, then part of Russia. His mother was Gustawa Zysan and his father was Jacques Funk, a dermatologist. At the time, education for Poles was difficult. All public schools were under Russia's control. Getting into a school required the help of someone with influence.

Funk was tutored at home until he was admitted to public school, where he did well at his studies. Dissatisfied with the education Funk was receiving, his parents enrolled him in the Warsaw Gymnasium in 1894. Funk graduated in 1900 and continued his education. He studied biology under Robert Chodat at the University of Geneva in Switzerland, then transferred to the University of Bern in Germany, where he studied chemistry under Carl Friedheim and Stanislaw Kostanecki. (Funk and Kostanecki later published an article on the synthesis of stilbestrols.)

In 1904, Funk earned his Ph.D. after completing his dissertation on how to prepare two stilbene dyes, Brasilin and H„matoxylin. He then went to the Pasteur Institute in Paris, where he studied organic bases and amino acids under Gabriel Bertrand. During his time in Paris, Funk experimented with laccol, a phenol that caused him to suffer painful swelling. After he stopped those experiments, Funk began to study the building blocks of sugars and proteins.

In 1906, Funk held an unpaid position at the University of Berlin. There he worked in the laboratory of Emil Fischer. Under Fischer's assistant, Emil Abderhalden, Funk experimented with protein metabolism. A year later, Funk began a paid position as a biochemist at the Municipal Hospital in Wiesbaden, Germany. There, he found that when dogs were fed purified proteins they lost weight, but when they were fed horse meat and powdered milk, they gained weight. The results were not what Abderhalden expected; he decided that Funk's methods were at fault and discounted the data. When relations with Abderhalden did not improve, Funk transferred to the pediatric clinic at the University of Berlin.

Discovered "Vitamines"

In 1910, Funk left Germany and became a scholar at the Lister Institute of Preventative Medicine in London, England. In 1911 he published his first paper in English, on dihydroxyphenylalanine. Charles Martin, head of the institute, gave Funk another problem to study: beriberi. Beriberi is a disease of the peripheral nerves that causes pain and paralysis. At the time of Funk's study, it was not known that beriberi is caused by a lack of B1, but only that the disease occurred in areas of the Orient where the population consumed polished rice.

Earlier work in how deficiencies in diet could cause health problems were the basis for Funk's work. In 1873, research had shown that dogs did not thrive on a diet of washed meat and that pigeons that ate synthetic food developed symptoms of disease. At the turn of the 20th century, Christiaan Eikjman found that chickens made sick by a diet of polished rice would recover if fed rice hulls. He determined that rice hulls could cure some diseases, but he assumed wrongly that the problem arose from a toxic factor in rice. In the early 1900s, Sir Frederick Hopkins found that mice fed a diet of carbohydrates, proteins, fats, and mineral salts stopped growing if their diet did not contain milk. He determined that milk contained a substance that maintained health.

Building on the work of such researchers, Funk looked at how food factors affected health. It was already known that including citrus fruit in the diet could prevent scurvy and that rice hulls could prevent beriberi. But it was not clear why. To find the answer, Funk experimented with extracts made from the dark outer coating of rice that was removed during polishing. He found that there was a substance within that coating that cured beriberi. Funk also fed pigeons a diet of polished rice and found that within a short time the birds lost weight and became unhealthy. Since the birds were consuming enough proteins, he knew that the problem was not a protein or amino acid deficiency.

Birds fed the extract made from rice polish soon began to recover. Also, birds that ate small amounts of yeast regained their health. Funk decided that there was a substance in the rice polish and the yeast that was required in small amounts to maintain health. He published an article on the subject titled "On the Chemical Nature of the Substance which Cures Polyneuritis in Birds Induced by a Diet of Polished Rice."

The study led Funk to realize that there were substances in food essential to good health. He found that diseases such as beriberi, rickets, and scurvy could be cured by introducing into the diet organic compounds that contained certain chemical substances. Funk also maintained that certain diseases could be prevented by making sure the chemical substances were present in the diet. He called the substances "vitamines," with "vita" meaning vitality and "amines" meaning a chemical compound containing nitrogen. (The "e" was dropped in the 1920s when it was found that amines, or organic compounds derived from ammonia, were not always present.)

In 1912, Funk published his paper, "Vitamines." His publication earned him public recognition and a Beit Fellowship from the University of London. In 1913, Funk began working at the London Cancer Hospital Research Institute. He published his first book, Die Vitamine, translated in 1922 by Dr. H.E. Dubin into English. (Dubin collaborated with Funk to produce the first cod liver oil vitamin concentrate, called Oscodal.)

Later Career

In 1915 during World War I, Funk decided to leave England and accept a position at the Harriman Research Laboratory in New York City. Upon his arrival, he found to his dismay that the laboratory did not have research funding or equipment. Anxiety over how he would support his family caused Funk to suffer serious health problems. But he recovered and in 1916 accepted a position with Calco Company in Bound Brook, New Jersey. A year later, in 1917, he started working for the pharmaceutical firm Metz and Company in New York City. From 1918 to 1923, he also held an academic position at Columbia University's College of Physicians and Surgeons, where he worked on the synthesis of adrenaline.

Funk became a United States citizen in 1920. In 1923, sponsored by the Rockefeller Foundation, he returned to Poland and worked as chief of the Department of Biochemistry at the State Institute of Hygiene. While there, he increased the quality of insulin produced in the laboratory. In 1928, because of political unrest in Poland, he accepted a part-time position with Gr, my, a pharmaceutical house in Paris. There he founded Casa Biochemica, a private laboratory that produced biochemical products. From 1927 to 1936, Funk also worked as a biochemist for the Rousell Company.

In 1936, Funk published Vitamin and Mineral Therapy, also translated by H.E. Dubin. In this publication he called vitamin deficiencies insidious because they occur without warning and can cause irreparable damage. "Lack of a particular vitamin leads eventually to a particular nutritional disease," Funk wrote. "However, long before this deficiency disease becomes apparent, a shortage of one or more vitamins may—and usually does—give rise to some tissue changes which lower the general resistance of the body making it susceptible to the attack of certain infections."

After Germany invaded Poland in 1939, Funk returned to New York and began working for the U.S. Vitamin Corporation, a company for which he had previously worked and which owned the copyright to Vitamin and Mineral Therapy. In 1947, with the support of the U.S. Vitamin Corporation, Funk became head of the Funk Foundation for Medical Research. In 1963, Funk gave up an active role in research when he retired. He died in New York City on November 20, 1976.

Married in 1914 to Alix Denise Schneidesch, Funk had two children. During his lifetime, he published more than 140 articles, including material on gonadotropic hormones, ulcers, and diabetes.

Legacy of Improved Health

Funk advanced humankind's understanding of nutrition and revolutionized the way people looked at their health. He never isolated a pure vitamin, but he did prepare concentrations that contained several vitamins. His conclusion that lack of vitamins in the diet was responsible for disease helped develop effective preventive and curative measures for anemia, beriberi, osteomalacia, pellagra, rickets, scurvy, and sprue.

During the vitamin craze that followed Funk's discoveries, many people overlooked Funk's observation that only small amounts of the substances were necessary to maintain health. Nutritional supplements were said to cure diseases, and vitamin makers claimed that synthetic vitamins improved energy and health. Consumers began to ingest large amounts of vitamins, despite the fact that small amounts were sufficient and that too much of some vitamins, such as A and D, are toxic to the body.

Although he is remembered primarily for his work with vitamins, Funk was also instrumental in advancing studies on hormones, cancer, and diabetes. His contributions to science include developing accurate views of the relationship between diet and health that led to advances in child and adult nutrition. He also contributed to getting proper nutrients into manufactured foods.

Other contributions made by Funk include finding the connection between Vitamin B complex and carbohydrate metabolism, discovering that vitamins influence the speed at which cancer grows, separating Vitamin D from cholesterol, and realizing that bacteria are a necessary part of the diet.

Generations of children made to consume cod liver oil by their parents may not appreciate Funk's work, but it is certain that his contributions have improved the health of countless. Indeed, his work clearly contributed to the increased life span many people enjoy in modern society.


American National Biography, Oxford University Press, 1999.

Dictionary of American Biography, Supplement 8: 1966-1970, American Council of Learned Societies, 1988.

Funk, Casimir and H.E. Dubin, Vitamin and Mineral Therapy, U.S. Vitamin Corporation, 1936.


Washington Post, October 16, 1985.


"Funk, Casimir,", (January 6, 2002).

"Polish Born Biochemist Casimir Funk Introduces the Name Vitamin," Intellihealth, (January 6, 2002).

"Year 1912—Casimir Funk Coins The Name 'Vitamin,"' India Infoline, (January 6, 2002). □

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Casimir Funk." Encyclopedia of World Biography. . 26 Apr. 2017 <>.

"Casimir Funk." Encyclopedia of World Biography. . (April 26, 2017).

"Casimir Funk." Encyclopedia of World Biography. . Retrieved April 26, 2017 from

Funk, Casimir

Funk, Casimir

(b. Warsaw, Poland [then Russia], 23 February 1884; d. New York, N.Y., 20 November 1967)


Funk was the son of Jacques and Gustawa Zysan Funk. His father was a prominent dermatologist. In 1904 he received the Ph.D. in organic chemistry at the University of Bern, where he worked on the synthesis of stilbestrols. Following work at the Pasteur Institute, the Wiesbaden Municipal Hospital, and the University of Berlin, where he was an assistant to Emil Abderhalden, he took a post at the Lister Institute in London, where he was soon assigned to work on beriberi. In 1914 he married Denise Schneidesch of Brussels, by whom he had two children. In 1915 the Funks immigrated to New York, where he held several industrial and university positions. In 1920 he became a U.S. citizen. In 1923 the Rockefeller Foundation supported his return to Warsaw as chief of the biochemistry department in the State Institute of Hygiene, a post which he abandoned in 1927 because of political conditions in Poland. In Paris, from 1928 to 1939, Funk was consultant to a pharmaceutical firm and founder of the Casa Biochemica, a privately financed research institute. This was abandoned in the face of the German invasion, and Funk returned to New York as consultant to the U.S. Vitamin Corporation. From 1940 he was president of the Funk Foundation for Medical Research.

At the Lister Institute, Funk prepared a pyrimidine-related concentrate of rice polishings which was curative for beriberi in pigeons. In 1912 he proposed the term “vitamine” (for vital amine) for organic compounds responsible in trace amounts for the cure or prevention of beriberi, scurvy, rickets, and pellagra. His concentrates were primarily nicotinic acid (noneffective for beriberi but later shown by Elvehjem to be curative for pellagra) contaminated with the anti-beriberi vitamin. Besides his work on vitamins, Funk conducted extensive studies on animal hormones, particularly the male sex hormone, and on the biochemistry of cancer, ulcers, and diabetes. He theorized freely and saw close relationships between trace nutrients (vitamins and minerals), hormones, and enzymes. A number of substances developed in his laboratories were sold commercially in the pharmaceutical industry.


I. Original Works. A comprehensive but incomplete bibliography of Funk’s publications appears in Harrow’s biography (see below). His first paper on the nature of the anti-beriberi substance is “On the Chemical Nature of the Substance Which Cures Polyneuritis in Birds Induced by a Diet of Polished Rice,” in Journal of Physiology, 43 (1911), 395–400. The paper introducing the term “vitamine” is “The Etiology of Deficiency Diseases,” in Journal of State Medicine, 20 (1912), 341–368. Die Aetiologie der Avitaminosen mit besonderer Berücksichtigung der physiologischen Bedeutung der Vitamine (Wiesbaden, 1914) was printed in several German eds. and in an English trans. by H. E. Dubin as The Vitamins (Baltimore, 1922). See also his L’histoire de la découverte des vitamines (Paris, 1924).

II. Secondary Literature. A popularized biography is Benjamin Harrow, Casimir Funk, Pioneer in Vitamins and Hormones (New York, 1955). An anonymous sketch of his life appeared in Current Biography, 6 (1945), 22–24; and an obituary notice appeared in the New York Times (21 Nov. 1967).

Aaron J. Ihde

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Funk, Casimir." Complete Dictionary of Scientific Biography. . 26 Apr. 2017 <>.

"Funk, Casimir." Complete Dictionary of Scientific Biography. . (April 26, 2017).

"Funk, Casimir." Complete Dictionary of Scientific Biography. . Retrieved April 26, 2017 from

Funk, Casimir

Funk, Casimir

American biochemist

Casimir Funk was born in Warsaw, Poland. The son of a dermatologist, Funk earned a doctorate degree at the University of Bern, Switzerland, at the young age of twenty. He then worked at the Pasteur Institute in Paris, the Wiesbaden Municipal Hospital in Germany, the University of Berlin, and the Lister Institute in London.

Funk emigrated to the United States in 1915 and held several industrial and university positions in New York. He became a naturalized U.S. citizen in 1920. With funding provided by the Rockefeller Foundation, Funk returned to Warsaw in 1923 to serve as the director of the Biochemistry Department of the State Institute of Hygiene. Funk moved to Paris in 1927 and became a consultant to a pharmaceutical company and founded Casa Biochemica, a privately funded research institution.

At the outbreak of World War II in 1939, Funk returned to the United States to work as a consultant for the United States Vitamin Corporation. He became the president of the Funk Foundation for Medical Research in 1940.

Funk's work with what are now called vitamins began when he recognized that certain food factors were needed to prevent nutritional-deficiency diseases, such as beriberi (vitamin B1 deficiency), scurvy (vitamin C deficiency), pellagra (niacin deficiency), and rickets (vitamin D deficiency). He suggested that these unidentified substances were all in a class of organic compounds called amines , which are vital to life, so he named them vitamines (vital amines). Although they turned out not to be amines, Funk's proposal (and the coining of the term vitamine ) has been called a stroke of genius. He later confirmed the existence of vitamins B1, B2, C, and D, and he stated that they were necessary for normal health and the prevention of deficiency diseases.

In his work to find the specific factor that prevented beriberi, Funk eventually isolated nicotinic acid (niacin, or vitamin B1) from rice. Although it did not cure beriberi, scientists later discovered that it cured pellagra. Funk also worked with the B-vitamin thiamine, determining its molecular structure and developing a method for synthesizing it.

In his later research, Funk studied animal hormones and contributed to the knowledge about hormones of the pituitary and sex glands, emphasizing the importance of balance between hormones and vitamins. Funk also investigated the biochemistry of cancer , diabetes , and ulcers . He improved manufacturing methods for many commercial drugs and developed several new commercial products in his laboratories. He died in Albany, New York, on November 20, 1967.

see also Beriberi; Pellagra; Vitamins, Fat Soluble; Vitamins, Water-Soluble.

Karen Bryla


Abbott, David (1984). The Biographical Dictionary of Scientists: Chemists. New York: P. Bedrick.

Jukes, T. H. (1989). "Historical Perspectives: The Prevention and Conquest of Scurvy, Beri-Beri, and Pellagra." Preventive Medicine 18:877883.

Koppman, Lionel (1986). Guess Who's Jewish in American History. New York: Steimatzky.

Internet Resource

"Casimir Funk." Available from <>

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Funk, Casimir." Nutrition and Well-Being A to Z. . 26 Apr. 2017 <>.

"Funk, Casimir." Nutrition and Well-Being A to Z. . (April 26, 2017).

"Funk, Casimir." Nutrition and Well-Being A to Z. . Retrieved April 26, 2017 from

Funk, Casimir

Casimir Funk (kăz´Ĭmēr fŏŏngk), 1884–1967, American biochemist, b. Poland, Ph.D. Univ. of Bern, 1904. He first came to the United States in 1915 and was naturalized in 1920. Credited with the discovery of vitamins, Funk stirred public interest with his paper (1912) on vitamin-deficiency diseases. He coined the term vitamine and later postulated the existence of four such materials (B1, B2, C, D), which he stated were necessary for normal health and for the prevention of deficiency diseases. Funk contributed to knowledge of the hormones of the pituitary gland and the sex glands and emphasized the importance of the balance between hormones and vitamins. He is the author of Vitamines (tr. 1922).

See biography by B. Harrow (1955).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Funk, Casimir." The Columbia Encyclopedia, 6th ed.. . 26 Apr. 2017 <>.

"Funk, Casimir." The Columbia Encyclopedia, 6th ed.. . (April 26, 2017).

"Funk, Casimir." The Columbia Encyclopedia, 6th ed.. . Retrieved April 26, 2017 from

Funk, Casimir

Funk, Casimir (1884–1967) Polish‐born chemist who coined the word vitamin (1912). First isolated the active crystalline anti‐beriberi factor (thiamin) from rice polishings (1911).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Funk, Casimir." A Dictionary of Food and Nutrition. . 26 Apr. 2017 <>.

"Funk, Casimir." A Dictionary of Food and Nutrition. . (April 26, 2017).

"Funk, Casimir." A Dictionary of Food and Nutrition. . Retrieved April 26, 2017 from