Table 1.
Baseline demographics
| Characteristics | Number (%) of patients |
|---|---|
| Age distribution (year) | |
| 20–30 | 17 (29.8%) |
| 31–40 | 20 (35.1%) |
| 41–50 | 20 (35.1%) |
| Age (year) | |
| Mean + SD | 36.1 ± 8.1 |
| Median | 36 |
| Min/max | 21/48 |
| Hair color | |
| Black | 48 (84.2%) |
| Brown | 9 (15.8%) |
| Skin phototype | |
| III | 1 (1.8%) |
| IV | 55 (96.4%) |
| V | 1 (1.8%) |
| Homogeneity of facial skin color | |
| Homogenous | 26 (45.6%) |
| Not homogenous | 31 (54.4%) |
| Treatment | |
| GSSG | 18 (31.6%) |
| GSH | 20 (35.1%) |
| Placebo | 19 (33.3%) |
Abbreviations: SD, standard deviation; GSSG, oxidized glutathione; GSH, reduced glutathione.