Exact profiles of (13)CO(2) recovery in breath air after per oral administration of [(13)C]methacetin in two groups of different ages.

The aim of this study is to determine if age is a factor influencing the results of a [(13)C]methacetin breath test ((13)C-MBT). Two groups of healthy volunteers, each comprising six men and six women, but differing in average age (Y=young, 25.1+/-0.