are my b12 injections going to make me more fertile Vitamin for MTHFR: Injection or sublingual B12? – Methyl-Life® Supplements The Truth About B12 Injections:
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J Clin Epidemiol

You should speak with your healthcare provider if you experience any of these symptoms

That is also when your health practitioner will know if this route is viable for you or not

Well, people do seem to react differently