how is vitamin b12 injections given Benefits of for Optimal Health do you have to be
Description
Nat Chem Biol

Strands are thickening and lengthening

Some people get plenty through diet but still struggle to absorb it properly

If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again
