are you allowed to inject vitamin b12 Best Injection Site: Administering B12 Shots Vitamin B12 Injections - Vie
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The panel agreed that initial treatment should be parenteral for severe cases, while high-dose oral B12 can be considered for maintenance

Warnings Benzyl Alcohol: Patients who have early Leber's disease (LHON) a hereditary disease that causes optic nerve atrophy have been found to suffer severe and swift optic atrophy when treated with vitamin B12
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So, while the explanation touches on real aspects of neuropathy and B12 deficiency, it might oversimplify or misrepresent some of the complex interactions in the nervous system
