From: Hair for brain trade-off, a metabolic bypass for encephalization
Amino acidsa | Median and range within studies |
---|---|
g/100 g hair | |
Cysteine + methionine + cysteic acidb | 17 (8 –18.7) |
Phenylalanine + tyrosine | 4 (1.7 – 5.7) |
Arginine | 6.5 (2.5 – 9.3). |