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If you are considering getting a B12 shot, you should be aware of the signs of a deficiency

Lightweight and easy to apply directly to the scalp

Metformin and certain reflux medications can lower your bodys ability to absorb B12 from oral supplements

The AAFP advises that injectable therapy leads to more rapid improvement and should be considered in patients with severe deficiency or severe neurologic symptoms (Langan RC, Goodbred AJ, 2017)

You might need a B complex supplement if you can't get the recommended daily amount of B vitamins from your diet

The lyophilized vial itself should be held at -20C for long-term stability