does injectable vitamin b12 go bad How Quickly Shot Work? Does It Help to Lose Weight? Vitamin B12 Injection Sites: All
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[3] Those taking high-dose oral supplements without medical supervision also face increased risk
If your digestive system isn't working properly, oral supplements can be ineffective
Pinch a skinfold
That matters if you have trouble absorbing B12 from food or pills, which is more common than most people realize
