Parameter | 4 weeks | 12 weeks | P valuea |
---|---|---|---|
L* value | 58.3 ± 3.9 | 59.5 ± 2.2b | NS |
L* value/control | 62.7 ± 2.8 | 62.4 ± 1.6 |  |
a* value | 3.0 ± 1.3 | 3.3 ± 0.9 | NS |
a* value/control | 2.2 ± 1.0 | 2.4 ± 0.9 |  |
b* value | -0.8 ± 1.6b | 0.1 ± 2.0b | NS |
b* value/control | 6.1 ± 1.1 | 6.6 ± 1.6 |  |