b12 injection sub q or im subq sites Instruction Guide for Intramuscular (IM) Self- injection of B12 Methylcobalamin 1mg/5mg Cyanocobalamin Injection – 1000 mcg/mL

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I wouldnt count on sources like seaweed, spirulina, or soil. I hear people that likely do need to supplement with B12 say that theyre OK because they eat foods that may include B12, but they can be unreliable sources, such as sea vegetables or nutritional yeast, says Ginger Hultin, MS, RDN, CSO, a lifelong vegetarian, chair of the VNDPG, and spokesperson for the Academy

Lots of processes in the body need B12 to operate effectively

For vitamin B12 deficiency, injecting the vitamin into the muscle is recommended if the deficiency is severe

Energy: Vitamin B12 plays a key role in the production of energy in livestock