can humans take animal b12 injections Vitamin B-12 1000 Injection (VetOne), 100 mL B - complex liver extrcat

Certain conditions may blunt or impede therapeutic response to methylcobalamin therapy

Fermented foods (such as tempeh), nori, spirulina, chlorella algae, and unfortified nutritional yeast cannot be relied upon as adequate or practical sources of B-12.39,40 Vegans must regularly consume reliable sourcesmeaning B-12 fortified foods or B-12 containing supplementsor they could become deficient, as shown in case studies of vegan infants, children, and adults

Potential Side Effects and Precautions Most people do pretty well with MIC B12 shots, but sometimes you might notice a few things

Washington, DC: The National Academies Press

FDA Recommendations - Locate and buy a sharps biohazard disposal container for B12 needles

If possible, work under a laminar flow hood