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b12 injections where to give Inject Vitamin B12 vitamin Store How to
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Its more expensive and may not suit everyones tolerance

Because B12 is critical for neurological function, DNA production, and red blood cell development, a shortage can have wide-reaching effects
Human Liver Nicotinamide N-Methyltransferase
Serious neurological compromise due to vitamin B 12 deficiency in infants of vegan and vegetarian mothers
