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Top 10 keywords in terms of frequency of occurrence.
| Rank | Keyword | Occurrences | Total link strength |
| 1 | Gastrointestinal microbiome | 1,319 | 4,891 |
| 2 | Toxicity | 663 | 2,723 |
| 3 | Microbiota | 412 | 1,780 |
| 4 | Oxidative stress | 267 | 1,187 |
| 5 | Metabolism | 263 | 1,103 |
| 6 | Exposure | 234 | 1,099 |
| 7 | Inflammation | 200 | 938 |
| 8 | Bacteria | 170 | 757 |
| 9 | Health | 157 | 725 |
| 10 | Probiotics | 143 | 669 |
