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This monograph presents studies in which a correlation is sought between the vitamin C content of the diet, the serum ascorbic acid level and the clinical conditions which might have their origin in a deficient intake of vitamin C. The subjects were 70 nurses from a municipal hospital in Copenhagen who recorded their own diets and 87 children, aged 9 to 14 years, from an asylum for feebleminded children. Of the children, 10 were on a carefully weighed dietary, while 77 received a diet in which each meal was supervised and the number of portions ingested were recorded. The third group consisted of 249 persons whose intake of vitamin C was known approximately from "data obtained about the diet." Obervations on the nurses extended over three to four weeks and those on the children three weeks.
Serum ascorbic acid content was determined by the method of Lund and Lieck, using
C-Vitaminstudier: Om korrelationerne mellem blodserumascorbinsyreindholdet, den gennem kosten indgivne C-vitaminmaengde og visse saakaldte D-hypovitaminotiske symptomer, specielt gingivitis.. Arch Intern Med (Chic). 1947;80(3):420. doi:10.1001/archinte.1947.00220150130022