Abstract
The vitamin B-6 status of 112 healthy adolescents was assessed from erythrocyte vitamin B-6 concentration, coenzyme stimulation of erythrocyte alanine (E-ALAT), erythrocyte asparate (E-ASP-AT) aminotransferase activities and vitamin B-6 intakes. The dietary intake was 1.56 mg vitamin B-6/day and the erythrocyte vitamin B-6 was 13.0±3.5 mg/ml pkd cell. All the biochemical indices evaluated did not vary significantly (p>0.05) with age, sex and menarche. Coenzyme stimulation of E-ALAT activity of <16% corresponded with coenzyme stimulation of E-ASP-AT activity of <50%. Also, 29% and 11.6% of the subjects exhibited deficient vitamin B-6 status according to E-ALAT and E-ASP-AT activity, respectively. Erythrocyte vitamin B-6 concentration of 12.5 mg/ml pkd cell corresponded with acceptable enzyme activity and is adopted as the lower limit of vitamin B-6 adequacy in these subjects.
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