best place to inject vitamin b12

B12 Injection Bag - Etsy https://www.mountainside-medical.com/cdn/shop/files/Vitamin-B12-Injection-Cyanocobalamin-Shot-1000-mcg-Multiple-Dose-1-mL_512x512.jpg?v=1766445479 Size:1000 mcg/ml - 30 ml x 1 Vitamin B12 for Injection Digestive issues may further reduce the effectiveness

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