While oral absorption is limited for B12, taking very high doses (e.g., 1000mcg or 2000mcg) can allow for a small amount of passive absorption that doesnt rely on intrinsic factor
Short-term clinical trial data from the Metabolic Pharmaceuticals program did not reveal serious adverse events at the doses tested orally
Many payers, including Medicare and Medicaid, require the NDC to appear on the claim alongside J1815, formatted in the loop 2410 segment of the 837P claim file
Although tobacco use, alcohol use disorder, aspirin, NSAIDs, and family history were incorporated as PSM covariates and well balanced after matching, EHR-based capture rates for behavioral variables underestimate true prevalence, and residual confounding from unmeasured lifestyle factors cannot be fully excluded