1926 - Nutrition

Nutrition

Harvard physician Edwin J. (Joseph) Cohn, 33, develops an oral liver extract to treat pernicious anemia (see 1930; Minot and Murphy, 1924; Castle, 1929; blood plasma, 1940).

The B vitamin proves to be more than one vitamin (see McCollum, 1916). Joseph Goldberger shows that rats can be cured of pellagra on a diet from which the heat-labile part of vitamin B has been removed; biochemists D. I. Smith and E. G. Hendrick show that vitamin B is at least two vitamins and name the heat-resistant one vitamin G, or B2 (see 1915; McCollum, 1916; Warburg, 1932).

Two British biochemists show that sunlight converts the sterol ergesterol into vitamin D in animals (see Steenbock, 1923; 1927). The findings of explain why children who do not get enough sunlight are vulnerable to rickets (see 1930).