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. 2024 Apr 9;15(4):254. doi: 10.1038/s41419-024-06641-6

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — This chart depicts the number of clinical trials reported by ClinicalTrials.gov, focusing on three keyword groups: (supplementation OR vitamins OR supplement OR nutrition OR diet OR microelements OR food OR macronutrients OR polyphenols OR flavonoids) AND (immunotherapy OR immune system) AND (Cancer OR neoplasm OR tumor), with start dates on or after 01/01/2013.