Possible Side Effects Mild side effects of Vitamin B12 may include: ( 12 ) Mild pain, itching, or swelling at the injection site Temporary nausea or headache Mild diarrhea Hot flashes Vomiting These side effects do not affect all patients and are generally temporary and mild While rare, more serious side effects of Vitamin B12 injections can include ( 12 ): Irregular heartbeat Heart palpitations Hives or skin rash If you notice any severe reactions to a Vitamin B12 shot, contact a medical professional immediately
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Starting Dose of 1,000 mcg Weekly The first dose of 1,000 mcg weekly is a common start
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Although fundamental 5A-1MQ and LD-mediated changes to the microbiome were identified, this work is similar to many current studies where further investigations will clarify if changes in the microbiome are causative or associative 100
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