| Mental performance in cognitive tests on day A and day B 1 h after intake | |||||||
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| Day A (acute) | Day B (repetitive) | |||||
| Performance of d2 Test (d2) | |||||||
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| Placebo | Zem25 | Zem50 | Placebo | Zem25 | Zem50 | |
| 1 h | Mean | 11.02 | 11.57 | 11.11 | 12.18 | 12.46 | 12.38 |
| SD | ±3.02 | ±2.95 | ±2.69 | ±3.61 | ±2.82 | ±2.67 | |
| Performance of Memory Test (ME) | |||||||
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| Placebo | Zem25 | Zem50 | Placebo | Zem25 | Zem50 |
| 1 h | Mean | 6.51 | 7.05 | 6.60 | 7.10 | 6.51 | 7.73 |
| SD | ±1.93 | ±2.51 | ±2.42 | ±2.51 | ±2.18 | ±1.93 | |
| Performance of Arithmetic Calculation (CPT) | |||||||
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| Placebo | Zem25 | Zem50 | Placebo | Zem25 | Zem50 |
| 1 h | Mean | 2.41 | 4.09 | 3.86 | 2.67 | 3.26 | 3.19 |
| SD | ±1.68 | ±2.54 | ±2.14 | ±2.34 | ±2.49 | ±2.82 | |
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| p < 0.02 | p < 0.03 |
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| Performance of Reaction Time Test (RT) | |||||||
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| Placebo | Zem25 | Zem50 | Placebo | Zem25 | Zem50 |
| 1 h | Mean | 420.73 | 419.29 | 420.96 | 408.75 | 405.96 | 412.53 |
| SD | ±39.53 | ±37.83 | ±48.54 | ±30.78 | ±41.76 | ±37.65 | |
| Performance of Number Identifying Test (NIT) | |||||||
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| Placebo | Zem25 | Zem50 | Placebo | Zem25 | Zem50 |
| 1 h | Mean | 28.42 | 29.80 | 28.60 | 29.59 | 30.28 | 29.96 |
| SD | ±.97 | ±1.76 | ±3.74 | ±2.24 | ±2.23 | ±1.75 | |
| Performance of Number Connection Test (NCT) | |||||||
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| Placebo | Zem25 | Zem50 | Placebo | Zem25 | Zem50 |
| 1 h | Mean | 125.43 | 162.06 | 137.32 | 140.08 | 162.51 | 138.59 |
| SD | ±54.45 | ±31.49 | ±42.22 | ±48.68 | ±29.96 | ±32.49 | |
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| p < 0.01 |
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| p < 0.09 |
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