can b12 injections stop working

https://www.vie-aesthetics.com/wp-content/uploads/2019/11/shutterstock_1401012215-1024x684.jpg is b12 injections the same for humans and animals Benefits of Vitamin mg:10 Vitamin B Complex Injection b12 dogs – B12 for Malabsorption in Pets The pharmacological studies referenced throughout this article used subcutaneous injection in mice, generally in the 20 mg/kg range across multiple daily doses Size:1000 mcg/ml - 10 ml (Pack of 5)

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