BACKGROUND: Dietary nitrate (NO OBJECTIVE: We aimed to synthesize the available evidence regarding the effect of NO METHODS: An umbrella review was reported in accordance with the Preferred Reporting Items for Overviews of Reviews guideline. Seven databases (MEDLINE, EMBASE, Cochrane Database, CINAHL, Scopus, SPORTDiscus, and Web of Science) were searched from inception until July 2024. Systematic reviews with meta-analyses comparing NO RESULTS: Twenty systematic reviews with meta-analyses, representing 180 primary studies and 2672 unique participants, met the inclusion criteria. Our meta-analyses revealed mixed effects of NO CONCLUSIONS: This novel umbrella review with a large-scale meta-analysis provides an updated synthesis of evidence on the effects of NO CLINICAL TRIAL REGISTRATION: This study was registered in the International Prospective Register of Systematic Review (PROSPERO) database (registration number: CRD42024577461).