{"claimId":"clm_ec_b12_energy","grade":"C","version":0,"status":"current","verdict":"Vitamin B12 for energy / fatigue: Grade C at low certainty. corrects fatigue when B12 deficiency is present; no energy benefit in replete people","direction":"benefit","magnitude":{"metric":"other","value":null,"unit":"","ci95":null,"humanReadable":"corrects fatigue when B12 deficiency is present; no energy benefit in replete people","baselineAbsoluteRisk":null},"certainty":"low","clinicalMeaning":"small_but_potentially_useful","applicability":{"appliesTo":["adults"],"doesNotApply":[],"unknown":[]},"safetyQualifiers":[],"evidenceBundleId":"eb_ec_b12_energy","citations":[{"pmid":"33809274","design":"peer-reviewed"}],"reviewedBy":null,"reviewedAt":"2026-07-16T05:20:24.789Z","dateModified":"2026-07-16T05:20:24.789Z","methodologyVersion":"v1","methodologyDoi":"https://doi.org/10.5281/zenodo.21364236","canonicalUrl":"https://evidencebased.info/interventions/b12/energy","attribution":"Substrate (evidencebased.info), claim clm_ec_b12_energy v0, reviewed 2026-07-16","license":"CC-BY-4.0 proposed; reuse license pending governance ratification","governanceMode":"legacy","governanceStatus":"legacy-unverified","dataSource":"live"}