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22 May 2026 6 min Why do I feel worse after my B12 injection

Administration Depending on current best practices, treatment may be via injection or other medically approved delivery

While oral bioavailability is lower than subcutaneous administration, these studies established that even high oral doses maintained excellent safety profiles, though higher doses (54 mg) were associated with increased gastrointestinal discomfort

NNMT activity increases with age, obesity, and metabolic dysfunction

It reduces cholesterol levels

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