oral vitamin b12 vs injection Injections vs. Supplements: Which is Better? Frontiers | Efficacy of sublingual
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Increasing your intake of vitamin B12 through foods or supplements can help prevent deficiency, which may improve side effects like low energy levels and fatigue

Immune system disorders, such as Gravess disease or lupus

Therefore, in patients with sensory symptoms, differential diagnoses for both disorders need to be considered

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