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Vitamin M

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Scientific name: Obsolete term for folic acid

Substance/source: Pteroylglutamic acid

Physiological role: Prevents nutritional cytopenia in monkeys

Hypovitaminosis: Impaired growth of feathers in poultry;

Hypervitaminosis: Epileptiform convulsions in rat; Renal hypertrophy in rat;

Daily Requirements: 400 μg

Tolerable daily upper intake level: 1000 μg


  1. Day P, Langston W, Darby W. Failure of nicotinic acid to prevent nutritional cytopenia in the monkey. Proc Soc Exp Biol Med 1938; 38: 860–63.
  2. Combs Jr. G.F., 2012, “The Vitamins - Fundamental Aspects in Nutrition and Health - 3rd edition,” Academic Press; p. 517.
  3. Williams P., 2015, “The missing vitamin alphabet,” Nutrition & Dietetics [Web Reference]


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