[Vitamin B complex deficiency diseases].
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The role of the vitamins of the B group in the therapy of metabolic diseases has been the theme of a recent symposium. All these vitamins exert essential functions in the balance of the intermediary metabolism and consequently in the treatment of their disorders. As far as metabolic diseases and the use of vitamins, i.e. of biological substances, are concerned, the boundaries between the fields of therapy and prophylaxis are difficult to settle strictly. The recent literature concerning these points is reviewed and some concepts discussed.
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One untested but widely held opinion in Brazil is that oral use of vitamin B complex is useful as a mosquito repellent. We exposed Balb-C mice to a large number of Culex quinquefasciatus females, after giving vitamin B complex to mice (drops by mouth). There was no difference between mice attractiveness to mosquitoes in the vitamin B group compared to normal, but very few of the females bite mice in both groups, so the experiment was inconclusive. We suggest further experiments in this subject, using other models were the animals are more attractive to mosquitoes.
This study compared the B complex vitamin status at time of admission of 20 geriatric and 16 young adult non-alcoholic inpatients with major depression. Twenty-eight percent of all subjects were deficient in B2 (riboflavin), B6 (pyridoxine), and/or B12 (cobalamin), but none in B1 (thiamine) or folate. The geriatric sample had significantly higher serum folate levels. Psychotic depressives had lower B12 than did non-psychotic depressives. Poorer blood vitamin status was not associated with higher scores on the Hamilton Depression Rating Scale or lower scores on the Mini-Mental State Examination in either age group. The data support the hypothesis that poorer status in certain B vitamins is present in major depression, but blood measures may not reflect central nervous system vitamin function or severity of affective syndromes as measured by the assays and scales in the present study.
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