Population characteristics for the GEKKO participants analysed with protocol 6 by dietary habits
| Characteristics | Vegetarians | Semivegetarians | Non-vegetarians |
| N=6 | N=6 | N=6 | |
| Sex, n (%) | |||
| Female | 3 | 3 | 3 |
| Male | 3 | 3 | 3 |
| Age, n (%) | |||
| 50–54 years | 1 | 2 | 2 |
| 55–59 years | 4 | 2 | 4 |
| 60–64 years | 1 | 2 | 0 |
| Mean (SD) | 56.7 (±2.9) | 56.5 (±3.6) | 54.8 (±2.6) |