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Understanding the B12 Vitamin Shot: Benefits, Risks, and Dosage Guide Vitamin B12 shots: Uses, benefits, and side effects Vitamin B12 Deficiency Gaba Online Psychiatrist Constipation in B12 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 Are Vitamin B12 Shots Right for You?
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