Manganese absorption from mangold (Beta vulgaris): comparison of intrinsic and extrinsic labels

Lena Davidsson, Ake Cederblad, Bo Lönnerdal, Brittmarie Sandström

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The validity of the use of extrinsic labeling for studies of manganese absorption in man was evaluated using a test meal containing Beta vulgaris intrinsically labeled with 54Mn to which 52Mn was added extrinsically. Whole body retention of the two isotopes was measured in a whole body counter during days 7-25 after administration of the test meal to six subjects. No difference in level of retention or rate of excretion was observed for the two isotopes. The calculated absorption (X = SD) was 6.0 ± 3.4% and 6.2 ± 2.9% for 54Mn and 52Mn, respectively, resulting in a 54Mn : 52Mn ratio for fractional absorption from the test meal of 0.95 ± 0.14 (X ± SD). These results demonstrate that extrinsic labeling with radioisotopes of manganese is a valid method for measurement of manganese absorption from vegetables when studied in humans.

Original languageEnglish
Pages (from-to)323-326
Number of pages4
JournalThe Journal of Nutritional Biochemistry
Volume2
Issue number6
DOIs
Publication statusPublished - 1 Jan 1991

Keywords

  • Mn
  • Mn
  • extrinsic label
  • intrinsic label
  • manganese
  • whole body counting

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