why b12 injections Vitamin Injections: What You Need To Know Do You Need a Prescription

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I really needed to switch to injections to bypass my GI system

Uses : Suitable for administering larger doses of B12, particularly in cases where higher volumes are prescribed

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Consider intramuscular vitamin B 12 injections instead of oral replacement for suspected or confirmed vitamin B 12 deficiency caused by diet if: The person has another condition that may deteriorate rapidly and have a major effect on their quality of life (for example, a neurological or hematological condition such as ataxia or anemia)