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If a deficiency is linked to a chronic condition like pernicious anemia, Crohns, or celiac disease, you might need injections for the long haul to bypass the digestive system entirely
Research has shown that long-term use of certain drugs can interfere with absorption pathways
If youre getting weekly B12 shots , talking to your doctor about the best option for you is a good idea
That said, it is still a good idea to keep an eye on your pet after each dose and check with your veterinarian if you notice anything unusual, even though adverse reactions are considered very rare