Table 3.
Effect of supplemental vitamin E (VE) on serum Se and α-tocopherol and liver α-tocopherol concentrations of beef steers
| Supplemental VE treatment1 | P-value | |||||||
|---|---|---|---|---|---|---|---|---|
| CON | LOW | MED | HIGH | SEM | Linear | Quadratic | Cubic | |
| Serum Se, µg/L | ||||||||
| Day −12 | 75.2 | 75.8 | 76.2 | 70.4 | – | – | – | – |
| Day 26 | 96.9 | 98.0 | 94.0 | 97.1 | 3.65 | 0.90 | 0.56 | 0.58 |
| Serum α-tocopherol, mg/L | ||||||||
| Day −12 | 4.0 | 3.5 | 4.2 | 3.9 | – | – | – | – |
| Day 26 | 2.7 | 3.4 | 4.6 | 5.8 | 0.26 | <0.01 | 0.20 | 0.81 |
| Liver α-tocopherol, mg/kg wet tissue | ||||||||
| Day −32 | 11.0 | 8.5 | 10.3 | 11.1 | – | – | – | – |
| Day 24 | 6.4 | 8.7 | 10.1 | 15.2 | 0.86 | <0.01 | 0.70 | 0.26 |
1VE = vitamin E (ROVIMIX E-50 Adsorbate, DSM Nutritional Products, Heerlen, The Netherlands); CON = control (no supplemental VE); LOW = VE at 25 IU/kg DM; MED = VE at 500 IU per steer daily; HIGH = VE at 1,000 IU per steer daily.
2Values from day −1 and −3 (prior to treatment initiation) were utilized as a covariate in analysis.