best place to self inject b12 Optimal Injection Sites for Maximum Absorption and Benefits Ivy Grove Surgery : Self-administration

[9] Visual disturbances have been reported in patients with Leber hereditary optic neuropathy, and rapid B12 administration may precipitate optic nerve atrophy in this genetically predisposed population, mandating extreme caution or alternative therapy

For individuals managing a straightforward B12 deficiency without broader nutrient needs, shots remain one of the most practical and cost-effective treatment options

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If they think they may have a B12 deficiency, a blood test can determine this

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