To the Editor We commend Silverstein and colleagues1 for examining the appropriateness of vitamin B12 therapy among older adults (study population was restricted to persons ≥65 years of age). However, we would be cautious about classifying vitamin B12 supplementation as inappropriate on the basis of either a serum B12 level below the normal limit or the absence of a serum B12 level in the 12 months prior to a prescription.1
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Stall NM, Goldlist BJ, Alibhai SMH. Vitamin B12 Therapy in Older Adults and Misconception of Its Inappropriateness. JAMA Intern Med. 2019;179(11):1606. doi:10.1001/jamainternmed.2019.4926
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