Table 3 Summary information for seven tomato intervention studies that measured urate levels before and after intervention
Study | Total (n) | Age1 (years) | Urate Measurement | Start Urate2 (μmolL-1) | End Urate2 (μmolL-1) | P-value3 | Intervention | ||
|---|---|---|---|---|---|---|---|---|---|
All | M | F | |||||||
Engelhard et al. (37)4 | 31 | 18 | 13 | 48 (30–73) | Serum | 336.7 ± 14.3 | 349.2 ± 15.5 | P > 0.05 | Participants consumed 1 250 mg ‘Lyc-O-Mato’ tomato extract capsule per day for 8 weeks |
Jacob et al. (38) | 24 | 4 | 20 | 23 (19–27) | Plasma | 221.4 ± 49.8 | 221.0 ± 45.9 | P > 0.05 | Participants consumed 250 mL tomato juice twice daily for 2 weeks5 |
Urinary (mg/mg Cr) | 0.39 ± 0.2 | 0.52 ± 0.2 | P < 0.05 | ||||||
Lee et al. (39)6 | 10 | 10 | - | 26 | Plasma | 348 ± 55 | 394 ± 407 | P < 0.01 | Participants consumed a single 150 g portion of tomato sauce |
Todd et al. (40)4,8 | 34 | 13 | 21 | 52 (27–64) | Plasma | 326.1 ± 73.9 | 329.1 ± 77.5 | P > 0.05 | Participants consumed 500 mL tomato juice per day for 4 weeks |
Todd et al. (41)8 | 23 | 5 | 18 | 44 (24–61) | Plasma | 280.5 ± 72.0 | 292.2 ± 67.0 | P > 0.05 | Participants consumed 500 mL tomato juice per day for 4 weeks |
Abete et al. (36) | 30 | 18 | 12 | (18–50) | Serum | 267.7 ± 53.5 | 261.7 ± 71.4 | P > 0.05 | Participants consumed 160 g tomato sauce per day for 4 weeks |
Vinha et al. (42) | 35 | - | 35 | 20 (18–25) | Plasma | 207.6 ± 55.9 | 198.1 ± 46.4 | P < 0.001 | Participants consumed an ~90 g tomato each day before lunch for 4 weeks |