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Concentration and cognitive function may also be affected
According to StatPearls , patients with pernicious anemia require lifelong vitamin B12 injections and may want to consider dietary changes for B12 deficiency
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Wellness 27 May 2026 8 min read B12 injections: who actually needs them and how often
If you do the injections at home, it can be best to do them while your cat is calm or distracted, such as during a meal
Some people also report cravings for sugary or carbohydrate-heavy foods because low B12 causes fatigue, and the body seeks quick energy sources to compensate
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