{"claimId":"clm_ec_b2-vitc-skin","grade":"C","version":0,"status":"current","verdict":"Vitamin C for skin: Grade C at low certainty. topical better-supported than oral; oral may support collagen synthesis","direction":"benefit","magnitude":{"metric":"other","value":null,"unit":"","ci95":null,"humanReadable":"topical better-supported than oral; oral may support collagen synthesis","baselineAbsoluteRisk":null},"certainty":"low","clinicalMeaning":"small_but_potentially_useful","applicability":{"appliesTo":["adults"],"doesNotApply":[],"unknown":[]},"safetyQualifiers":[],"evidenceBundleId":"eb_ec_b2-vitc-skin","citations":[{"pmid":"28805671","design":"peer-reviewed"}],"reviewedBy":null,"reviewedAt":"2026-06-05T02:57:53.365Z","dateModified":"2026-06-05T02:57:53.365Z","methodologyVersion":"v1","methodologyDoi":"https://doi.org/10.5281/zenodo.21364236","canonicalUrl":"https://evidencebased.info/interventions/vitamin-c/skin","attribution":"Substrate (evidencebased.info), claim clm_ec_b2-vitc-skin v0, reviewed 2026-06-05","license":"CC-BY-4.0 proposed; reuse license pending governance ratification","governanceMode":"legacy","governanceStatus":"legacy-unverified","dataSource":"live"}