b12 vitamins injection vitamin deficiency treatment dosage Vitamin B12 Injection, 50 ml at ₹ 35/vial in Surat B12 Shots Tampa FL, Urgent

2026 Apr;652(8110):740-751

Nausea (most common, especially during first 1 to 2 weeks of a new dose) Diarrhea or, just as often, constipation Vomiting (less common but more likely at 9 to 12 mg) Reduced appetite, food noise quieting down (this is the goal, not a side effect) Skin sensitivity (dysesthesia): tingling, prickly feeling, or sunburn-like skin

Because B12 is water-soluble, the NIH Office of Dietary Supplements notes that no tolerable upper intake level has been established excess B12 is excreted by the body rather than accumulating to toxic levels

PubMed Kim, S.B., Kwon, D.R., Kwak, H., Shin, Y.B., Han, H.J., Lee, J.H., & Choi, S.H