Table 4.
Effect of increased inclusions of a Saccharomyces cerevisiae fermentation product (SCFP) on total (tGSH), oxidized (GSSG), and reduced (GSH) glutathione concentrations of newly weaned beef steers during a 56-d receiving period
| Treatment1 | P-value | |||||
|---|---|---|---|---|---|---|
| CON | SCFP14 | SCFP28 | SEM2 | Linear | Quadratic | |
| Red blood cell lysate | ||||||
| Glutathione3, µM | ||||||
| Day 0 | ||||||
| tGSH | 229.0 | 282.2 | 245.5 | – | – | – |
| GSSG | 67.6 | 72.5 | 69.3 | – | – | – |
| GSH | 161.4 | 209.7 | 176.2 | – | – | – |
| Ratio4 | 0.44 | 0.37 | 0.43 | – | – | – |
| Day 27 | ||||||
| tGSH | 173.6 | 203.8 | 187.0 | 11.04 | 0.38 | 0.11 |
| GSSG | 51.4 | 51.6 | 52.3 | 4.26 | 0.88 | 0.97 |
| GSH | 118.9 | 152.4 | 134.6 | 11.48 | 0.32 | 0.09 |
| Ratio | 0.50 | 0.34 | 0.47 | 0.055 | 0.65 | 0.05 |
| Day 56 | ||||||
| tGSH | 289.4 | 334.2 | 343.7 | 23.12 | 0.09 | 0.53 |
| GSSG | 88.7 | 93.4 | 98.2 | 4.86 | 0.19 | 0.99 |
| GSH | 198.9 | 244.2 | 227.1 | 12.91 | 0.13 | 0.07 |
| Ratio | 0.43 | 0.38 | 0.39 | 0.024 | 0.25 | 0.39 |
1CON = Original XPC (Diamond V, Cedar Rapids, IA) at 0 g·steer−1·d−1; SCFP14 = Original XPC at 14 g·steer−1·d−1; SCFP28 = Original XPC at 28 g·steer−1·d−1.
2Highest SEM of any treatment is reported.
3Day 0 values used as a covariate in analysis.
4Ratio of oxidized:reduced glutathione.