does b12 injection cause constipation in deficiency is primarily neurogenic, due to autonomic and enteric neuropathy causing slow gut motility • Constipation may precede anemia • Often improves after B12 replacement • Think of B12 How Quickly Does B12 Shot

Shi L, Chen B, Liu T, Li L, Hu B, Li C, et al

When Vitamin B12 levels are low, patients experience fatigue, and weakness

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* Nausea * Vomiting * Diarrhea **Rare Side Effects (may affect up to 1 in 1,000 people):** * Severe allergic reactions (anaphylaxis): Difficulty breathing, swelling of the face, lips, tongue, or throat, rapid heartbeat, dizziness

AOD-9604 is not approved by the FDA for therapeutic or cosmetic use