| to function | 15 | purpose |
| like serotonin | 14 | other |
| like any other organ | 8 | other |
| brain → need → nutrient | 50 |
| brain → require → nutrient | 17 |
| brain → use → nutrient | 4 |
| brain → rely on → nutrient | 4 |
| brain → depend on → nutrient | 3 |
| negative | neutral | positive |
| 0.195 | 0.604 | 0.201 |
| Raw frequency | 78 |
| Normalized frequency | 0.522 |
| Modifier score | 0.500 |
| Perplexity | 190.746 |