vitamin b12 injection vs tablet Oral versus intramuscular vitamin B12 for vitamin B12 deficiency Efficacy of sublingual and oral

Your doctor will typically monitor your response and perhaps repeat blood tests for vitamin levels (or relevant markers like homocysteine levels, complete blood count, etc.) after a certain number of injections

Who Can Benefit from B12

It contains a methyl group, making it bioavailable without the need for conversion

These are fairly benign (although expensive) and can prevent years of grief

The Smartest First Step: Know Your Levels Before you commit to either path, the most sensible thing you can do is find out what your B12 levels actually are

B vitamins and amino acids delivered intramuscularly reach full bioavailability, which means your body uses all of it, not a fraction.