{"claimId":"clm_ec_vitc_cold","grade":null,"version":0,"status":"current","verdict":"Vitamin C for cold prevention: Grade — at moderate certainty. no reduction in cold incidence in the general population","direction":"null","magnitude":{"metric":"other","value":null,"unit":"","ci95":null,"humanReadable":"no reduction in cold incidence in the general population","baselineAbsoluteRisk":null},"certainty":"moderate","clinicalMeaning":"no_established_threshold","applicability":{"appliesTo":[],"doesNotApply":[],"unknown":["population not reported"]},"safetyQualifiers":[],"evidenceBundleId":"eb_ec_vitc_cold","citations":[{"pmid":"23440782","doi":"10.1002/14651858.CD000980.pub4","design":"peer-reviewed"}],"reviewedBy":null,"reviewedAt":"2026-07-16T04:28:40.224Z","dateModified":"2026-07-16T04:28:40.224Z","methodologyVersion":"v1","methodologyDoi":"https://doi.org/10.5281/zenodo.21364236","canonicalUrl":"https://evidencebased.info/interventions/vitamin-c/cold-prevention","attribution":"Substrate (evidencebased.info), claim clm_ec_vitc_cold v0, reviewed 2026-07-16","license":"CC-BY-4.0 proposed; reuse license pending governance ratification","governanceMode":"legacy","governanceStatus":"legacy-unverified","dataSource":"live"}