can b12 injections cause upset stomach Vitamin B12: Symptoms, Dosage & Toxicity Risks Vitamin B12 Deficiency & Nerve

PMC 2739594

Low red blood cell counts (anemia) due to vitamin B12 deficiency

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There are quite a few people who just are not able to get enough vitamin B12 without receiving it through regular injections for a multitude of reasons, most often including dietary restrictions or medical conditions

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