Asked by granny2


How do b12 shots help me, and how long do they last?


Hi Granny2,

If B12 is too low you can have serious nerve damage, mental confusion, retina damage, and deficiencies that may be linked to heart disease, stroke, alzheimer's, incontinence, and hearing loss. Severe deficiency causes unusually high heart rates and breathing difficulty.

In order to absorb B12 it has to be broken down in the stomach by stomach acid. As you get older, stomach acid decreases. Also, if you frequently take antacids, such as Zantac, Tagamet, Prilosec, Previcid, or the diabetes drug Metformin (Glucophage), these medications interfere with B12 absorption.

By taking Vitamin B12 shots, you are delivering the needed nutrient by by-passing the stomach and typical route for absorption.

As far as how long they last and how frequently you need the injections, speak with your MD.

All the best,

Lisa Nelson, RD, LN

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Answered by Lisa Nelson, RD, LN