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Whole body production rates in μmol/kg lean body mass*h as measured by stable tracer methodology (mean (SE)) after a pulse with the respective tracers (Unpublished data).
| Substrate (stable tracer) | Older adults (n=11; 65–75y) |
|---|---|
| Leucine (L-[U-13C6]) | 154.1 (18.4) |
| α-ketoisocaproic acid ([1-13C]) | 23.7 (2.64) |
| β-hydroxy β-methylbutyrate ([3,4 methyl-13C3]) | 0.17 (0.02) |
