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Elevated serum vitamin B12 can result from several distinct mechanisms, broadly categorised into increased intake, impaired excretion, or release from tissue stores
The nausea typically emerges within 1-2 days of injection and resolves within 48-72 hours
Oral: Shorter systemic half-life, longer local GI effect SubQ/IM Injection: Longer systemic presence, especially with IM use 3
The peptide testing labs guide explains how to read and verify these certificates
A color change within the same vial over time is different and concerning
Jastreboff AM, Aronne LJ, Ahmad NN, et al
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