Table 2.
Summary of the studies found in PubMed by using ‘immune system’, ‘food’, and ‘food supplements’ as keywords.
| Immune System—Food | ||
| Studies in the last 10 years | Studies in the last 5 years | Studies in the last year |
| Total: 17,675 | Total: 9961 | Total: 1505 |
| 3047 reviews | 1844 reviews | 360 reviews |
| 1012 clinical trials | 424 clinical trials | 35 clinical trials |
| Immune System—Food Supplements | ||
| Studies in the last 10 years | Studies in the last 5 years | Studies in the last year |
| Total: 3560 | Total: 1802 | Total: 236 |
| 788 reviews | 433 reviews | 68 reviews |
| 559 clinical trials | 222 clinical trials | 15 clinical trials |