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. 2024 Jun 27;12(7):197. doi: 10.3390/dj12070197

Figure 4.

Figure 4

Vita EasyShade Advanced 4.0 spectrophotometer (VES) readings for b* (yellowness), showing a reduction in yellowness across the 4 time points for the active product (V34CC) but not the placebo. Bars show mean values and standard errors. The letter a shows groups that are not different from the baseline. Groups with the letter b are significantly different from the baseline (p < 0.001) but not different from one another.