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Regular consumption of these foods or supplements is essential, especially for vegetarians and vegans, to maintain adequate B12 levels and support energy, red blood cell production, and nerve function

Vitamin B12 injections are often recommended for people with difficulty absorbing this vitamin from the diet or oral supplements

In the Lancet 2021 Phase 2 trial at 4.5 mg/week, nausea occurred in 47% of participants, injection-site reactions in 43%, constipation in 21%, and vomiting in 8%

For Vitamin B12 injections, a gauge ranging from 25 to 30 is typically recommended

It works systemically to promote cellular migration and tissue repair