Table 2.
Popularity of the 20 most popular topics associated with dietary supplements, as a ratio with the value for “lutein” (adjusted data; relative search volume (RSV) over time).
| No. | Topic | Category | Ratio of RSV to “Lutein” |
|---|---|---|---|
| 1. | Magnesium | Mineral | 23.72 |
| 2. | Protein | Protein | 15.22 |
| 3. | Iron | Mineral | 15.12 |
| 4. | Calcium | Mineral | 13.74 |
| 5. | Vitamin D | Vitamin | 12.22 |
| 6. | Potassium | Mineral | 9.71 |
| 7. | Cobalamin | Vitamin | 9.36 |
| 8. | Caffeine | Chemical | 8.06 |
| 9. | Vitamin C | Vitamin | 7.38 |
| 10. | Omega-3 fatty acids | Fat or fatty acid | 6.80 |
| 11. | Creatine | Chemical | 6.77 |
| 12. | Folate | Vitamin | 6.67 |
| 13. | Zinc | Mineral | 6.36 |
| 14. | Aloe vera | Botanical | 6.11 |
| 15. | Ginger | Botanical | 5.91 |
| 16. | Dietary fiber | Fiber | 5.67 |
| 17. | Garlic | Botanical | 5.63 |
| 18. | Iodine | Mineral | 4.89 |
| 19. | Whey protein | Protein | 4.05 |
| 20. | Vitamin E | Vitamin | 3.86 |