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Plasma concentration in the postabsorptive condition in μmol/l (mean (SE))(13)
| Substrate | Younger Adults (n=10, 20–30y) | Older Adults (n=17, 60–70y) | P value |
|---|---|---|---|
| Leucine | 104.4 (10.7) | 99.4 (5.1) | 0.636 |
| α-ketoisocaproic acid (KIC) | 27.4 (2.5) | 20.7 (1.4) | 0.0206 |
| β-hydroxy β-methylbutyrate (HMB) | 3.5 (0.3) | 2.6 (0.2) | 0.0098 |
