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Is B12 Deficiency Reversible

For medicines: For risks and side effects, read the package insert and consult your doctor or your pharmacy

You will have to figure out what your body does best on, but in general, I recommend using 5,000mcg per day in sublingual form as long as you are not extremely sensitive to supplements and/or medications

Aminoglycosides, tetracyclines, and certain other antibiotics may alter gut microbiota composition, potentially affecting the small amount of vitamin B12 that is produced by colonic bacteria, though this is generally not clinically significant for patients receiving injectable B12 supplementation

doi: 10.1002/jps.20094 195 PardridgeW