| Amino Acids | Head Fresh | Muscle Fresh | Tail Fresh | MEAN | SD | CV% |
| Gly | 4.25 | 3.27 | 4.28 | 3.93 | 0.57 | 14.50 |
| Ala | 6.82 | 4.87 | 6.31 | 6.00 | 1.01 | 16.83 |
| Ser | 4.01 | 4.06 | 4.06 | 4.04 | 0.03 | 0.74 |
| Pro | 3.00 | 5.90 | 3.28 | 4.06 | 1.60 | 39.41 |
| Val | 4.38 | 4.87 | 4.98 | 4.74 | 0.32 | 6.75 |
| Thr | 3.92 | 3.29 | 4.15 | 3.79 | 0.45 | 11.87 |
| Ile | 3.68 | 3.54 | 5.01 | 4.08 | 0.81 | 19.85 |
| Leu | 7.20 | 9.15 | 8.96 | 8.44 | 1.08 | 12.80 |
| Asp | 8.72 | 10.39 | 8.76 | 9.29 | 0.95 | 10.23 |
| Lys | 8.26 | 7.00 | 8.08 | 7.78 | 0.68 | 8.74 |
| Met | 2.55 | 2.22 | 2.92 | 2.56 | 0.35 | 13.67 |
| Glu | 13.46 | 13.87 | 13.27 | 13.53 | 0.31 | 2.29 |
| Phe | 3.60 | 4.38 | 4.00 | 3.99 | 0.39 | 9.77 |
| His | 4.10 | 2.07 | 2.71 | 2.96 | 1.04 | 35.14 |
| Arg | 5.80 | 6.31 | 4.84 | 5.65 | 0.75 | 13.27 |
| Tyr | 2.44 | 3.43 | 2.96 | 2.94 | 0.50 | 17.01 |
| Try | 1.70 | 2.12 | 2.10 | 1.97 | 0.24 | 12.18 |
| Cys | 1.27 | 1.38 | 1.31 | 1.32 | 0.06 | 4.55 |
| Total | 89.16 | 92.12 | 91.98 | 91.09 | 1.67 | 1.83 |