Technology & Medicine › Electric age
Discovery of vitamins
1912 (Funk; Hopkins)· Invention or discovery· Germs, drugs & genetics
Mostly agreedGood evidence; some details, dates or numbers uncertain.
The finding that food contains tiny amounts of essential substances whose absence causes diseases such as scurvy, beriberi, rickets and pellagra.
See it on the Technology & Medicine map →How it works
In the 1890s Christiaan Eijkman in Java found that chickens fed polished white rice developed a beriberi-like illness, which rice bran cured. In 1912 Frederick Gowland Hopkins showed rats needed 'accessory food factors' beyond protein, fat and carbohydrates, and Polish biochemist Casimir Funk proposed 'vital amines', or vitamines. From the 1910s to the 1940s scientists identified vitamins A through K; Albert Szent-Györgyi isolated vitamin C by 1932. The 'e' was dropped because not all are amines.
Why it mattered
Vitamins explained a set of deadly diseases and led to fortified foods such as vitamin D milk and enriched flour, which largely ended rickets and pellagra in wealthy countries.
How we know
Feeding experiments on animals and people; Funk's and Hopkins's 1912 papers; the 1929 Nobel Prize to Eijkman and Hopkins; chemical isolation and synthesis of each vitamin from the 1920s to the 1940s.
Still unknown or debated
Funk's and Hopkins's shares of credit were disputed; today, how much supplements help well-fed people is debated, and most large trials find little benefit.
Connections (2)
▸James Lind's scurvy trial was explained by the Discovery of vitaminsWell documented
The connection
Lind gave 12 sailors with scurvy six different treatments; the two given oranges and lemons recovered fastest. He did not know why. The answer came with vitamins: scurvy is vitamin C deficiency, shown when Axel Holst and Theodor Frølich induced it in guinea pigs in 1907, and when Szent-Györgyi isolated the vitamin around 1928–32.
When and how
HMS Salisbury, at sea off England, May 1747; Kristiania (now Oslo), Norway, 1907; Szeged, Hungary, and Cambridge, England, 1928–32.
How we know
Lind's 1753 'Treatise of the Scurvy' records the trial; Holst and Frølich's guinea-pig studies and Szent-Györgyi's 1937 Nobel Prize confirmed the cause.
Debates and open questions
Why did the cure keep getting lost? The Royal Navy adopted lemon juice in 1795, later switched to weaker limes, and scurvy returned on 1870s polar expeditions.
▸Germ theory of disease wrongly blamed germs for beriberi before the Discovery of vitaminsWell documented
The connection
Germ theory's successes led doctors to look for a germ behind beriberi too. Japan's army doctors, including Mori Ōgai, held to that view, while navy surgeon Takaki Kanehiro cut beriberi with better diets in 1884. In Java, Eijkman also first suspected a microbe. Feeding studies finally showed the cause was something missing from food.
When and how
Japan's navy, 1884; Batavia (now Jakarta), Dutch East Indies, 1886–96, where Eijkman worked; his successor Gerrit Grijns concluded in 1901 that a nutrient was missing.
How we know
Eijkman's chicken experiments, Takaki's navy statistics and the Japanese army's heavy beriberi losses in the 1904–05 Russo-Japanese War are well recorded.
Debates and open questions
Takaki thought the cure was more protein, not a vitamin; how much institutional pride, not just science, kept Japan's army on polished white rice is debated.