Table 2.
Average amino acid concentrations
| (nmol/mL) | All | Men | Women |
|---|---|---|---|
| Glycine | 209 ± 50.3 | 213.1 ± 43.9 | 206.0 ± 56.5 |
| Alanine | 329.0 ± 62.3 | 355.7 ± 59.0 | 301.2 ± 53.4 |
| Serine | 112.7 ± 20.3 | 109.6 ± 19.9 | 115.9 ± 20.3 |
| Threonine | 123.5 ± 24.7 | 123.2 ± 19.4 | 123.7 ± 29.5 |
| Valine | 206.7 ± 37.8 | 229.0 ± 29.1 | 183.3 ± 31.3 |
| Isoleucine | 59.6 ± 12.8 | 68.0 ± 10.6 | 50.9 ± 8.2 |
| Leucine | 118.3 ± 23.6 | 135.6 ± 15.5 | 100.3 ± 15.7 |
| Lysine | 172.0 ± 31.6 | 189.8 ± 25.1 | 153.4 ± 26.8 |
| Arginine | 51.0 ± 16.8 | 51.9 ± 15.8 | 50.1 ± 17.9 |
| Histidine | 78.9 ± 8.1 | 83.2 ± 7.3 | 74.4 ± 6.3 |
| Tyrosine | 57.7 ± 10.4 | 62.0 ± 9.2 | 53.2 ± 9.8 |
| Phenylalanine | 55.1 ± 8.4 | 59.8 ± 7.6 | 50.2 ± 6.1 |
| Tryptophan | 55.7 ± 8.8 | 59.6 ± 8.7 | 51.7 ± 7.1 |
| Methionine | 23.4 ± 4.0 | 25.1 ± 3.6 | 21.6 ± 3.7 |
| Cysteine | 12.7 ± 4.1 | 13.8 ± 4.4 | 11.5 ± 3.4 |
| Proline | 137.2 ± 39.7 | 157.6 ± 40.0 | 115.8 ± 26.0 |
| Glutamine | 507.2 ± 70.9 | 539.0 ± 58.5 | 474.0 ± 67.9 |
| Glutamic acid | 40.7 ± 18.4 | 50.2 ± 18.0 | 30.9 ± 13.0 |
| Asparagine | 47.0 ± 6.9 | 48.5 ± 7.4 | 45.5 ± 6.1 |
| Aspartic acid | 2.9 ± 0.8 | 3.0 ± 1.0 | 2.7 ± 0.5 |
| Total AA | 2570.7 ± 298.1 | 2759.4 ± 191.4 | 2373.7 ± 260.2 |
| NEAA | 1677.5 ± 209.6 | 1786.2 ± 148.3 | 1564.1 ± 205.0 |
| EAA | 893.1 ± 121.0 | 973.2 ± 83.2 | 809.6 ± 95.2 |
| BCAA | 384.6 ± 71.0 | 432.6 ± 50.8 | 334.5 ± 52.0 |
Data are mean ± SD.
BCAA, branched-chain amino acid
EAA, essential amino acid
NEAA, non-essential amino acid; Total AA, total amino acid.