Table 3 Comparison of %¹³C dose h^{- 1} curves and %¹³C cumulative excretion curves after oral administration of L-[1-¹³C] Phenylalanine in elderly groups (mean ± SD).

8.6 ± 1.4

8.2 ± 1.3

6.2 ± 1.3 ^a

4.3 ± 1.0 ^{a, c}

2.2 ± 0.7 ^{a, c, d}

13.9 ± 1.8

13.1 ± 1.3

8.9 ± 1.7 ^a

6.2 ± 0.9 ^{a, c}

3.7 ± 0.8 ^{a, c, d}

12.3 ± 1.6

11.8 ± 1.6

6.9 ± 1.2 ^a

5.1 ± 0.6 ^{a, c}

4.1 ± 0.3 ^{a, c, e}

6.8 ± 0.8

6.5 ± 0.7

5.4 ± 0.5 ^a

4.4 ± 0.5 ^{a, c}

3.9 ± 0.3 ^{a, c, e}

5.2 ± 0.5

5.1 ± 0.5

4.8 ± 0.5 ^a

3.9 ± 0.5 ^{a, c}

3.5 ± 0.3 ^{a, c, e}

4.5 ± 0.5

4.4 ± 0.5

4.0 ± 0.4 ^a

3.2 ± 0.5 ^{a, c}

2.8 ± 0.4 ^{a, c, e}

3.7 ± 0.5

3.6 ± 0.5

3.1 ± 0.4 ^a

2.4 ± 0.5 ^{a, c}

1.9 ± 0.6 ^{a, c, e}

1.8 ± 0.3

1.7 ± 0.3

1.3 ± 0.3 ^a

0.9 ± 0.2 ^{a, c}

0.5 ± 0.1 ^{a, c, d}

4.7 ± 0.5

4.4 ± 0.4

3.1 ± 0.6 ^a

2.2 ± 0.3 ^{a, c}

1.2 ± 0.3 ^{a, c, d}

7.2 ± 0.6

6.9 ± 0.4

4.5 ± 0.7 ^a

3.2 ± 0.3 ^{a, c}

2.1 ± 0.3 ^{a, c, d}

8.6 ± 0.7

8.2 ± 0.5

5.7 ± 0.7 ^a

4.1 ± 0.4 ^{a, c}

2.9 ± 0.3 ^{a, c, d}

9.7 ± 0.7

9.3 ± 0.5

6.6 ± 0.8 ^a

4.9 ± 0.5 ^{a, c}

3.6 ± 0.3 ^{a, c, d}

10.6 ± 0.7

10.2 ± 0.5

7.5 ± 0.8 ^a

5.6 ± 0.5 ^{a, c}

4.2 ± 0.4 ^{a, c, d}

11.4 ± 0.8

10.9 ± 0.5

8.1 ± 0.8 ^a

6.1 ± 0.6 ^{a, c}

4.6 ± 0.4 ^{a, c, d}