Fig. 2.
A: exponential time course of body water enrichment over 8 days following oral bolus of 150 ml of deuterium oxide (D2O; 70 atom%). B: natural logarithm transformed body water enrichment for calculation of decay constant and elimination half-life. C: correlation of 2 different body water analytical techniques using high-temperature conversion elemental analyzer (TC-EA) direct liquid injection and gas chromatography-pyrolysis-isotope ratio mass spectrometry (GC-Pyr-IRMS). D: comparison of plasma alanine enrichment and saliva enrichment on day 8. *Significantly different from initial day 1 time point, P < 0.01. APE, atom% excess.