Table 1.
Lipid content and fatty acid composition reported of beef muscle from steers (British and crossbred) finished in different and contrasting production systems.
| Production system | Reference | |||
|---|---|---|---|---|
| Pasture | Supplementation | Feedlot | ||
| IMF (%) | 2.86 b | 4.09 a | 3.85 a | [25] |
| 4.96 | 4.52 | [28] | ||
| 2.83 | [29] | |||
| 0.98 b | 1.30 a | [30] | ||
| 2.80 b | 4.40 a | [31] | ||
| 2.12 b | 3.61 a | [32] | ||
|
| ||||
| SFA (% total FA) | 38.40 a | 37.85 a | 35.33 b | [25] |
| 46.61 | 45.80 | [28] | ||
| 43.1 | [29] | |||
| 38.76 | 39.27 | [30] | ||
| 48.80 a | 45.10 b | [31] | ||
| 42.45 b | 43.43 a | [32] | ||
|
| ||||
| MUFA (% total FA) | 37.74 b | 40.89 a | 40.77 a | [25] |
| 41.63 | 37.35 | [28] | ||
| 30.2 | [29] | |||
| 24.69 b | 34.99 a | [30] | ||
| 42.50 b | 46.20 a | [31] | ||
| 43.87 b | 47.89 a | [32] | ||
|
| ||||
| PUFA (% total FA) | 7.95 a, b | 7.50 b | 9.31 a | [25] |
| 5.58 b | 10.12 a | [28] | ||
| 8.73 | [29] | |||
| 28.99 a | 19.06 b | [30] | ||
| 3.41 a | 2.77 b | [31] | ||
|
| ||||
| PUFA/SFA | 0.21 b | 0.20 b | 0.27 a | [25] |
| 0.12 b | 0.23 a | [28] | ||
| 0.20 | [29] | |||
|
| ||||
| n-6/n-3 | 1.72 c | 3.77 b | 10.38 a | [25] |
| 2.47 b | 5.50 a | [28] | ||
| 1.47 | [29] | |||
| 1.77 b | 8.99 a | [30] | ||
| 2.78 b | 13.60 a | [31] | ||
| 1.96 b | 3.57 a | [32] | ||
|
| ||||
| CLA (% total FA) | 0.72 a | 0.58 b | 0.31 c | [25] |
| 0.33 | [33] | |||
IMF: intramuscular fat; SFA: saturated fatty acid; MUFA: monounsaturated fatty acid; PUFA: polyunsaturated fatty acid; CLA: conjugated linoleic acid.
a, b, c mean values in row with different letters differ statistically (P < 0.05).