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Common side effects of vitamin B12 injections include mild diarrhea, itching, nausea and vomiting, dizziness, headaches, and hot flashes
Its estimated that between 1.5 and 15% of people have a vitamin B12 deficiency, and many of them dont even realize it
They are often found in eggs, milk, other dairy products, fish, and meat
Oral B12 supplements are widely available in tablet, capsule, and sublingual forms
Exploring B12 Shots & Injections: Examining the Definite Impact on the Immune System, Alongside Evaluating Alternatives
2.5 Quality assessment and risk of bias In line with PRISMA guidelines, the assessment of methodological quality was conducted to evaluate the strength of evidence, recognising that methodological limitations may introduce bias
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