Frederick Gowland Hopkins changed the way scientists understood food. In animal-feeding experiments published in 1912, he showed that a diet containing protein, carbohydrates, fats, minerals and water could still fail to support growth. He proposed that tiny quantities of other substances were also essential, calling them “accessory food factors”. Later known as vitamins, these factors became central to the study of nutrition. Hopkins shared the 1929 Nobel Prize in Physiology or Medicine with Christiaan Eijkman for work on vitamins, but his career also encompassed muscle chemistry, university teaching and leadership of British scientific institutions.

From Eastbourne to Cambridge

Hopkins was born in Eastbourne on 20 June 1861. He attended the City of London School before transferring to Alexandra Park College in Hornsey. He pursued further study through the University of London’s external programme, taking evening classes at Birkbeck College, and then entered the medical school at Guy’s Hospital.

After graduating, he taught physiology and toxicology at Guy’s Hospital from 1894 to 1898. In 1898, at a meeting of the Physiological Society, Michael Foster invited him to join Cambridge’s Physiological Laboratory to investigate the chemical aspects of physiology. Biochemistry was not yet recognised as a separate scientific discipline. Hopkins became a lecturer in chemical physiology at Emmanuel College in 1900; that year Cambridge awarded him an MA honoris causa. He received a doctorate in physiology from the University of London in 1902 and also took up a readership in biochemistry at Trinity College.

Hopkins became a Fellow of Trinity in 1910 and, in 1914, Cambridge’s first Professor of Biochemistry. His Cambridge students included Judah Hirsch Quastel and Joseph Needham, who became notable scientists in their own right. His appointments placed him at the centre of a developing field: his work involved both investigating the chemistry of living systems and establishing biochemistry as a subject for teaching and research.

Food, growth and accessory factors

Hopkins’s best-known experiments tested whether the recognised major nutrients could, by themselves, sustain animal growth. In 1912, he reported that diets made up of purified protein, carbohydrate, fat, minerals and water did not support normal growth. He concluded that ordinary food must also contain very small quantities of unidentified substances essential to growth and survival. He called these “accessory food factors”; the substances were later named vitamins.

The experiments challenged the idea that the principal nutrients alone explained the value of food. Hopkins did not, on the evidence presented here, identify vitamins A, B, C and D. His contribution was to demonstrate the need for additional factors and to propose their importance, opening a line of investigation into what foods contain and how the body uses them. Eijkman’s work on beriberi formed a related strand of the research recognised by their joint Nobel Prize in 1929.

During the First World War, food shortages and rationing made nutritional research especially pertinent. Hopkins examined margarine and found it inferior to butter because it lacked vitamins A and D. Vitamin-enriched margarine was introduced in 1926 as a result of this work. The episode connects laboratory analysis with a practical question about the nutritional value of a widely used food.

Muscle chemistry and other investigations

Nutrition was only one part of Hopkins’s research. He studied how cells obtain energy through oxidation and reduction reactions. In 1907, working with Walter Morley Fletcher, he investigated the relationship between lactic acid and muscle contraction. They found that oxygen depletion caused lactic acid to accumulate in muscle. Their work helped prepare the way for later studies by Archibald Hill and Otto Fritz Meyerhof on the carbohydrate metabolism that supplies energy for muscle contraction.

Hopkins also investigated glutathione, which he isolated from animal tissues and characterised in 1921. He initially proposed that it was composed of glutamic acid and cysteine. Its structure remained controversial; in 1929 he concluded that it was a tripeptide containing glutamic acid, cysteine and glycine, a conclusion consistent with independent work by Edward Calvin Kendall. Hopkins had discovered the amino acid tryptophan in 1901. Together, these investigations show the breadth of his interest in the chemical processes of living organisms.

Honours and scientific leadership

Hopkins received the Royal Society’s Royal Medal in 1918, the University of Edinburgh’s Cameron Prize for Therapeutics in 1922 and the society’s Copley Medal in 1926. Elected a Fellow of the Royal Society in 1905, he served as its president from 1930 to 1935. He was also president of the British Association for the Advancement of Science in 1933.

King George V knighted Hopkins in 1925. In 1935, he was appointed to the Order of Merit. The 1929 Nobel Prize, shared with Eijkman, recognised their work on vitamins. These distinctions accompanied a career that combined experimental research with teaching and institutional responsibility, at a time when biochemistry was gaining recognition as a distinct field.

Family and final years

Hopkins married Jessie Anne Stephens in 1898. They had a son and two daughters; their younger daughter, Jacquetta Hawkes, became an archaeologist and married the writer J. B. Priestley. Hopkins died in Cambridge on 16 May 1947, aged 85, and was buried at the Parish of the Ascension Burial Ground in the city.

His professional life was closely associated with British institutions, from his teaching at Guy’s Hospital to his professorship at Cambridge and presidency of the Royal Society. That record sits alongside research carried out across several areas of biochemistry: the nutritional factors in food, the chemistry of muscle and the characterisation of compounds found in animal tissues.

Why Frederick Gowland Hopkins deserves a place in British Legacy

Hopkins deserves a place in British Legacy for the evidence his experiments brought to the study of nutrition. His 1912 animal-feeding work showed that a diet containing the recognised major nutrients could still be inadequate for growth. By proposing that small quantities of other substances were essential, he gave researchers a way to investigate nutritional factors beyond protein, carbohydrate and fat. The work helped establish the importance of vitamins and was recognised with the 1929 Nobel Prize, shared with Christiaan Eijkman. Hopkins’s study of margarine also linked nutritional research to food supply: his finding that it lacked vitamins A and D preceded the introduction of vitamin-enriched margarine in 1926.

His British legacy is also institutional. Hopkins became Cambridge’s first Professor of Biochemistry, helped train later scientists, and led the Royal Society from 1930 to 1935. His presidency of the British Association for the Advancement of Science added another national scientific role. Alongside the research on muscle chemistry, glutathione and tryptophan, these achievements show a career wider than a single celebrated discovery. Hopkins helped advance knowledge of how living systems work while giving a developing discipline a stronger place in British university and scientific life. The consequences of his research reached beyond Britain, but the institutions in which he worked and served are a concrete part of his national legacy.

Sources

Frederick Gowland Hopkins — Wikipedia, revision 1376412899

Adapted in part from Frederick Gowland Hopkins by Wikipedia contributors, under CC BY-SA 4.0. Text has been edited and combined with the existing article; this adapted text is shared under the same licence. Contributor history.