does b12 injections have side effects

https://manhattanivtherapy.com/wp-content/uploads/2025/02/Vitamin-B12-Shot_inj_2x.webp imported vitamin b12 for livestock animals Specification:5 mg Discounting : For cost-effectiveness analyses, a discount rate of 5% is applied (to both costs and effects/QALYs), as recommended by economic guidelines A Guide to Vitamin B12 Deficiency: Causes and Treatment | Learn With NiaHealth

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