what is better b12 injections or tablets Vitamin vs. Oral Supplements: Which Better? B12 Shot Guide: Benefits, Dosage

(More information) The long-term use of certain medications, such as inhibitors of stomach acid secretion and the anti-diabetes drug, metformin, can adversely affect vitamin B 12 absorption

It may also occur if your diet is deficient in foods high in vitamin B12 or if you are using drugs that prevent the absorption of this vitamin

When needed, multivitamins that contain B6 or B-complex supplements that contain several types of B vitamins can be helpful

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