Custom Peptide Supply Vitamin B12 Solution 1000mcg 2ML Bulk Orders Manufactry Vitamin B12 Injection 100ml by Troy First Vet Richtafort Phosphorous + B12 Injection 100mL Vitamin B 12 Injection, 3,000 mcg mL 100 mL NEW TREATMENT ALERT A vitamin B12 injection helps treat or prevent deficiency by delivering the vitamin directly into the bloodstream. It's often used for people with absorption issues and is usually safe