13C abundances of nutrients and the effect of variations in 13C isotopic abundances of test meals formulated for 13CO2 breath tests.

@article{Schoeller198013CAO,
  title={13C abundances of nutrients and the effect of variations in 13C isotopic abundances of test meals formulated for 13CO2 breath tests.},
  author={Dale A. Schoeller and Peter D. Klein and John B. Watkins and Tibor F. Heim and William C Maclean},
  journal={The American journal of clinical nutrition},
  year={1980},
  volume={33 11},
  pages={2375-85}
}
Unlike 14CO2 breath tests, 13CO2 breath tests are performed in the presence of a large background of naturally occurring isotope. Because the exact abundance of 13CO2 in breath can be changed by variations in diet, a study of the 13C abundance of dietary constituents and their effects on breath 13CO2 has been undertaken. Dietary constituents have been combusted to CO2 and the relative abundance of 13C analyzed by mass spectrometry. Breath CO2 was collected and isotopically analyzed after the… CONTINUE READING
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