| in helping maintain healthy skin | 11 | purpose |
| to carry oxygen | 5 | purpose |
| for making dna | 5 | purpose |
| iron → be → necessary | 61 |
| iron → be → required | 24 |
| iron → be → necessity | 5 |
| iron → be → need | 4 |
| iron → be → must | 4 |
| negative | neutral | positive |
| 0.137 | 0.700 | 0.163 |
| Raw frequency | 98 |
| Normalized frequency | 0.640 |
| Modifier score | 0.500 |
| Perplexity | 159.860 |