| completely | 7 | degree |
| no matter what is stated | 4 | other |
| to no side effects | 3 | other |
| melatonin → be → natural | 19 |
| melatonin → be → natural substance | 18 |
| melatonin → be → natural product | 4 |
| melatonin → be → natural compound | 4 |
| melatonin → be → all-natural substance | 3 |
| negative | neutral | positive |
| 0.123 | 0.461 | 0.416 |
| Raw frequency | 48 |
| Normalized frequency | 0.483 |
| Modifier score | 0.500 |
| Perplexity | 56.173 |