From nature to IL-10 Activator Gene ID active substance. The cross-field validation in these three methods could consolidate our conclusions. In addition, among our benefits is primarily driven by the subgroup analysis in population greater than 50 years old, that will bring considerable meaning towards the neighborhood simply because HNC is very prevalent about 50 years old. Based on information from almost 81,908 participants across 11 nations, the general ability of our findings is fairly solidified. Suppose this could be confirmed in futureFrontiers in Immunology | www.frontiersin.orgFebruary 2021 | Volume 12 | ArticlePu et al.Vitamin D in HNCrandom clinical trials or additional comprehensive population research. In that case, a recommendation of vitamin D for persons whose age is greater than 50 may achieve enormous progress in preventing HNC rate worldwide. Undoubtedly, the acceptable quantity of supplemental vitamin D to prevent overdose-related side-effects wants additional research.controlled trials with larger sample sizes and distinctive ethnic populations are required to clarify the present findings.Data AVAILABILITY STATEMENTThe original contributions presented within the study are incorporated in the article/Supplementary Material. Additional inquiries is often directed to the corresponding authors.LimitationsWe must be conscious that available research included in our study are observational investigations, which may perhaps cause inevitable biases within the evaluation. Observational reports of vitamin D intake cannot preclude the possibility that other confounding factors including outdoor sun exposure and also other physical conditions connected towards the bioavailability of 25-OHD could exist. In addition, these enrolled research utilized meals frequency questionnaires to assess dietary intake of vitamin D, which indicates that a possible bias in the inaccuracy induced by food frequency questionnaires. Having said that, we are able to confirm the conclusion by the evaluation from the circulating 25-OHD concentrations and VDR genomic phenotypes, which could counteract the drawbacks in meals frequency questionnaires. The information composition is inadequate to conduct in-depth subgroup evaluation, however the stratified and sensitivity analyses ensure that our outcomes are comparatively stable. Due to the fact of a handful of studies, we did not execute publication bias. All included literature was searched based on English; therefore, language bias could also exist. The non-classical function of vitamin D signaling in stimulating innate immunity and suppressing inflammatory responses has been extensively explored, further investigation is needed around the direct effects of T lymphocytes in adaptive immunity.AUTHOR CONTRIBUTIONSConceptualization: YP, GZ, DH, YL, and XZ. Methodology: YP, GZ, YX, SZ, BT, and HH. Validation: YP, GZ, YX, SZ, BT, HH, and IW. Formal evaluation: YP, GZ, and IW. Investigation: YP and GZ. Resources: IW, YL, and XZ. Data curation: YP, GZ, YX, SZ, BT, HH, and IW. Writing–original draft preparation: YP and GZ. Writing–review and editing: YX, SZ, BT, HH, and IW. Supervision: DH, YL, and XZ. Project administration: DH, YL, and XZ. Funding acquisition: DH, YL, and XZ. All authors contributed for the post and approved the submitted version.FUNDINGThis perform was supported by National Crucial Research and Improvement Project (Nos. DNA Methyltransferase Inhibitor drug 2020YFC1316900 and 2020YFC1316901), National Organic Science Foundation of China (Nos. 81974424, 81874133, 81772903, 81602389, and 82073009), Organic Science Foundation of Hunan Province (Nos. 2020JJ4827, 2019JJ50944, and 2018JJ2630), the Huxiang Young Talent Project.