vitamin b12 injection how long does it last a Shot How Long Does a B12

If the medication is discontinued, appetite and energy may gradually swing back, which can feel weird and require additional support

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Having the shot directly in to the muscle allows the liquid vitamin to enter the blood stream quickly, bypassing the digestive system and the gastric acids and many other obstacles anything which is taken via the mouth has to go through to reach the small intestine, for re absorption

- You are over the age of 50, as the ability to absorb B12 decreases with age