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Any alternative text (alt text) provided alongside figures in this article has been generated by Frontiers with the support of artificial intelligence and reasonable efforts have been made to ensure accuracy, including review by the authors wherever possible

The pricing confusion that surrounds it online, with numbers that vary by a factor of ten depending on the source, is not a reflection of what the therapy should cost

Oral methylcobalamin for everyday energy support Research has shown that high-dose oral B12 even in people with some absorption challenges can achieve adequate blood levels through passive diffusion, a secondary absorption pathway that doesn't depend on intrinsic factor

Episodes are typically brief, lasting seconds to minutes rather than hours